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annotate Sphinx/source/plugins/python.rst @ 1023:5d4701d8fe28

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replaced osimis/orthanc by orthancteam/orthanc
author Alain Mazy <am@osimis.io>
date Thu, 01 Feb 2024 15:09:48 +0100
parents a3436ae3709c
children 94d41b7d1aac
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1 .. _python-plugin:
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2
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3
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4 Python plugin for Orthanc
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5 =========================
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6
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7 .. contents::
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9
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10 Overview
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11 --------
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12
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13 This plugin can be used to write :ref:`Orthanc plugins
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14 <creating-plugins>` using the `Python programming language
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15 <https://en.wikipedia.org/wiki/Python_(programming_language)>`__
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16 instead of the more complex C/C++ programming languages.
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17
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18 Python plugins have access to more features and a more consistent SDK
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19 than :ref:`Lua scripts <lua>`. The largest part of the Python API is
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20 automatically generated from the `Orthanc plugin SDK in C
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21 <https://orthanc.uclouvain.be/hg/orthanc/file/Orthanc-1.12.3/OrthancServer/Plugins/Include/orthanc/OrthancCPlugin.h>`__
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22 using the `Clang <https://en.wikipedia.org/wiki/Clang>`__ compiler
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23 front-end.
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24
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25 As of release 3.2 of the plugin, the coverage of the C SDK is about
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26 87% (138 functions are automatically wrapped in Python out of a total
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27 of 158 functions from the Orthanc SDK 1.8.1).
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30 Source code
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31 -----------
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32
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33 * Link to the `official releases of this plugin
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34 <https://orthanc.uclouvain.be/downloads/sources/orthanc-python/index.html>`__.
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35
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36 * Link to the `code repository
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37 <https://orthanc.uclouvain.be/hg/orthanc-python/>`__.
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39
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40 Licensing
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41 ---------
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42
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43 Pay attention to the fact that this plugin is licensed under the terms
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44 of the `AGPL license
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45 <https://en.wikipedia.org/wiki/GNU_Affero_General_Public_License>`__.
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46
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47 This has an important consequence: If you distribute Orthanc to
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48 clients together with one Python script, or if you put an Orthanc
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49 server equipped with one Python script on a Web portal, you **must**
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50 disclose the source code of your Python script to the Orthanc
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51 community under the terms of the AGPL license.
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52
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53 We suggest you to put the source code of your Python scripts on the
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54 dedicated `"OrthancContributed" repository on GitHub
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55 <https://github.com/jodogne/OrthancContributed/tree/master/Plugins>`__,
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56 and/or to send it to the `Orthanc Users discussion forum
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57 <https://discourse.orthanc-server.org>`__.
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58
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59 Check out the :ref:`FAQ about licensing <licensing>` for more context.
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60
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61
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62 Usage
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63 -----
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64
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65 Docker
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66 ......
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67
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68 .. highlight:: python
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69
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70 The most direct way of starting Orthanc together with the Python
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71 plugin is through :ref:`Docker <docker>`. Let's create the file
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72 ``/tmp/hello.py`` that contains the following basic Python script::
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73
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74 print('Hello world!')
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75
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76 .. highlight:: json
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77
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78 Let's also create the file ``/tmp/orthanc.json`` that contains the
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79 following minimal :ref:`configuration for Orthanc <configuration>`::
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80
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81 {
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82 "StorageDirectory" : "/var/lib/orthanc/db",
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83 "RemoteAccessAllowed" : true,
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84 "Plugins" : [
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85 "/usr/local/share/orthanc/plugins"
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86 ],
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87 "PythonScript" : "/etc/orthanc/hello.py"
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88 }
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89
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90 .. highlight:: bash
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91
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92 Given these two files, Orthanc can be started as follows::
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93
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94 $ docker run -p 4242:4242 -p 8042:8042 --rm \
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95 -v /tmp/orthanc.json:/etc/orthanc/orthanc.json:ro \
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96 -v /tmp/hello.py:/etc/orthanc/hello.py:ro \
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97 jodogne/orthanc-python
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98
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99 .. highlight:: text
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100
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101 You'll see the following excerpt in the log, which indicates that the Python plugin is properly loaded::
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102
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103 W0331 15:48:12.990661 PluginsManager.cpp:269] Registering plugin 'python' (version mainline)
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104 W0331 15:48:12.990691 PluginsManager.cpp:168] Python plugin is initializing
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105 W0331 15:48:12.990743 PluginsManager.cpp:168] Using Python script "hello.py" from directory: /etc/orthanc
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106 W0331 15:48:12.990819 PluginsManager.cpp:168] Program name: /usr/local/sbin/Orthanc
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107 Hello world!
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108
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109
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110 `Here <https://github.com/orthanc-server/orthanc-setup-samples/tree/master/docker/python/>`__ is a full example
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111 of a more complex setup using the :ref:`orthancteam/orthanc <docker-orthancteam>` images.
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113
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114 Microsoft Windows
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115 .................
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116
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117 Pre-compiled binaries for Microsoft Windows are now part of the
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118 `Windows installers <https://www.orthanc-server.com/download-windows.php>`__
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119 but not installed by default. They are also `available here
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120 <https://orthanc.uclouvain.be/downloads/windows-32/orthanc-python/index.html>`__.
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121
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122 Beware that one version of the Python plugin can only be run against
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123 one version of the Python interpreter. This version is clearly
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124 indicated in the filename of the precompiled binaries.
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125
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126 Pay also attention to pick the right 32/64 bits version. If you are
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127 running Orthanc 64bits, install Python in 64bits and select the 64bits
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128 Python plugin too.
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129
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130 When you install Python on your Windows machine, make sure to install
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131 Python for ``All Users`` and select the ``Add Python to Path`` option.
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132
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133 Compiling from source
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134 .....................
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135
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136 For GNU/Linux
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137 ^^^^^^^^^^^^^
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138
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139 .. highlight:: bash
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140
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141 The procedure to compile this plugin from source is similar to that
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142 for the :ref:`core of Orthanc <compiling>`. The following commands
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143 should work for most UNIX-like distribution (including GNU/Linux)::
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144
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145 $ mkdir Build
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146 $ cd Build
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147 $ cmake .. -DPYTHON_VERSION=3.7 -DSTATIC_BUILD=ON -DCMAKE_BUILD_TYPE=Release
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148 $ make
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149
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150 Before running CMake, make sure that the Python interpreter and its
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151 associated development library are installed. On Ubuntu 18.04 LTS, you
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152 would for instance install packages ``libpython3.7-dev`` and
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153 ``python3.7``.
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154
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155 The compilation will produce the shared library ``OrthancPython``,
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156 that can be loaded by properly setting the ``Plugins``
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157 :ref:`configuration option <configuration>` of Orthanc.
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158
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159 **Warning:** The shared library is only compatible with the Python
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160 interpreter whose version corresponds to the value of the
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161 ``PYTHON_VERSION`` argument that was given to CMake.
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162
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163 **Note for OS X:** As indicated by `Stephen Douglas Scotti
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164 <https://groups.google.com/g/orthanc-users/c/RnmZKFv8FaY/m/HhvOD2A2CAAJ>`__,
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165 here is a sample invocation of CMake to force the version of Python to
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166 be used on OS X::
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167
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168 $ cmake .. -DPYTHON_VERSION=3.8 -DSTATIC_BUILD=ON -DCMAKE_BUILD_TYPE=Release \
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169 -DPYTHON_LIBRARY=/usr/local/Cellar/python@3.8/3.8.5/Frameworks/Python.framework/Versions/3.8/lib/libpython3.8.dylib \
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170 -DPYTHON_INCLUDE_DIR=/usr/local/Cellar/python@3.8/3.8.5/Frameworks/Python.framework/Versions/3.8/include/python3.8/
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171
364
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172
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173 For Microsoft Windows
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174 ^^^^^^^^^^^^^^^^^^^^^
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175
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176 .. highlight:: text
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177
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178 You are of course free to compile the plugin from sources. You'll have
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179 to explicitly specify the path to your Python installation while
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180 invoking CMake. For instance::
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181
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182 C:\orthanc-python\Build> cmake .. -DPYTHON_VERSION=3.8 -DPYTHON_WINDOWS_ROOT=C:/Python38 \
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183 -DSTATIC_BUILD=ON -DCMAKE_BUILD_TYPE=Release -G "Visual Studio 15 2017"
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184
442
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185 **Note about debug builds**: Usually, building Python modules such as the Python
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186 plugin for Orthanc in debug mode (where ``_DEBUG`` is defined) leads to a module
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187 (``.exe`` or ``.dll``) that requires a debug build of Python, and debug versions of all
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188 the Python libraries. This is quite cumbersome, for it requires building Python
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189 on your own or downloading additional debug files.
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190
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191 Since using a debug build of Python is only necessary in very specific cases
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192 (such as the debugging of code at the boundary between Python and an extension),
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193 we have changed the default behavior to use the release Python library by default.
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194
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195 This means that you are able to build this plugin in debug mode with the
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196 standard Python distribution.
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197
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198 In case you need to use the Python debug libraries, you can instruct the build
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199 system to do so by setting the ``PYTHON_WINDOWS_USE_RELEASE_LIBS`` CMake option,
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200 that is ``ON`` by default, to ``OFF``. The previous build example would then be,
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201 should you require a full debug build::
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202
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203 C:\orthanc-python\Build> cmake .. -DPYTHON_VERSION=3.8 -DPYTHON_WINDOWS_ROOT=C:/Python38 \
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204 -DSTATIC_BUILD=ON -DPYTHON_WINDOWS_USE_RELEASE_LIBS=OFF \
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205 -DCMAKE_BUILD_TYPE=Debug -G "Visual Studio 15 2017"
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206
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207 Please note that this CMake option only impacts **debug** builds under Windows,
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208 when using (any version of) the Microsoft Visual Studio compiler.
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209
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210 The precompiled binaries all use release (i.e. non-debug) versions of Python.
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211
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212
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213 Configuration options
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214 ---------------------
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215
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216 The two main configuration options that are available for this plugin
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217 are the following:
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218
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219 * ``PythonScript`` indicates where the Python script is located. If
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220 this configuration option is not provided, the Python plugin is not
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221 started.
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222
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223 * ``PythonVerbose`` is a Boolean value to make the Python interpreter
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224 verbose.
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225
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226 Consequently, a minimal :ref:`configuration file <configuration>` for
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227 Orthanc could be::
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228
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229 {
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230 "Plugins" : [ "." ],
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231 "PythonScript" : "my-plugin.py",
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232 "PythonVerbose" : false
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233 }
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234
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235 Starting with release 4.1 of the Python plugin, it is also possible to
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236 specify the configuration of the plugin in a dedicated ``Python``
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237 section as follows::
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238
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239 {
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240 "Plugins" : [ "." ],
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241 "Python" : {
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242 "Path" : "my-plugin.py", // Alias for the global "PythonScript" option
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243 "Verbose" : false, // Alias for the global "PythonVerbose" option
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244 "DisplayMemoryUsage" : false
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245 }
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246 }
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247
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248 The option ``Python.DisplayMemoryUsage`` was introduced in release 4.1
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249 of the plugin. If set to ``true``, Orthanc will display the memory
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250 usage of the Python interpreter every second.
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251
343
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252
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253 Samples
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254 -------
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255
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256 Extending the REST API
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257 ......................
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258
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259 Here is a basic Python script that registers two new routes in the
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260 REST API:
343
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261
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262 .. literalinclude:: python/extending-rest-api.py
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263 :language: python
343
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264
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265 .. highlight:: json
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266
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267 Here is the associated minimal configuration file for Orthanc
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268 (provided the Python script is saved as ``rest.py``)::
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269
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270 {
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271 "Plugins" : [ "." ],
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272 "PythonScript" : "rest.py",
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273 "PythonVerbose" : false
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274 }
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275
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276 .. highlight:: bash
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277
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278 The route can then be accessed as::
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279
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280 $ curl http://localhost:8042/toto
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281 ok
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282
469
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283
1013
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284 Overriding the core REST API
ab270400aae1 python: overriding core API
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285 ............................
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286
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287 You may also use a python plugin to replace an existing REST API route:
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288
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289 .. literalinclude:: python/extending-rest-api-2.py
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290 :language: python
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291
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292
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293
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294 When calling the REST API from a python plugin, you may use e.g.
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295 ``RestApiPost`` to call the native Orthanc REST API and must
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296 call ``RestApiPostAfterPlugin`` to call the REST API from plugins.
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297
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298
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299 Note however, that, as of Orthanc 1.12.3, the Orthanc plugin SDK
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300 does not support multiple plugins implementing the same route.
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301 Orthanc will actually accept e.g a Python plugin that overrides
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302 a DICOMWeb route but it is impossible to tell which route
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303 will be called in the end since this depends on the registration
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304 order of the plugins that is not deterministic.
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305
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306
ab270400aae1 python: overriding core API
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307
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308
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309 .. _python-changes:
345
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310
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311 Listening to changes
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312 ....................
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313
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314 This sample uploads a DICOM file as soon as Orthanc is started:
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315
703
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316 .. literalinclude:: python/listening-changes.py
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317 :language: python
345
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318
590
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319
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320 .. warning::
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321 In releases <= 3.0 of the Python plugin, deadlocks might emerge if
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322 you call other core primitives of Orthanc (such as the REST API) in
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323 your callback function. This issue has been `fixed in release 3.1
991
1316bc62b5d5 migration to UCLouvain servers
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324 <https://orthanc.uclouvain.be/hg/orthanc-python/rev/46fe70776d61>`__.
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325
600
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326 As a **temporary workaround** against such deadlocks in releases <=
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327 3.0, if you have to call other primitives of Orthanc, you should make
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328 these calls in a separate thread, passing the pending events to be
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329 processed through a message queue. Here is the template of a possible
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330 solution to postpone such deadlocks as much as possible by relying on
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331 the multithreading primitives of Python:
591
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332
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333 .. literalinclude:: python/changes-deadlock-3.0.py
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334 :language: python
600
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335
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336 Beware that **this workaround is imperfect** and deadlocks have been
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337 observed even if using it! Make sure to upgrade your plugin to solve
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338 this issue for good. Note that this temporary workaround is not needed
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339 in releases >= 3.1 of the plugin.
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340
591
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341
590
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342
345
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343 Accessing the content of a new instance
346
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344 .......................................
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345
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346 .. literalinclude:: python/accessing-new-instance.py
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347 :language: python
346
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348
590
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349 .. warning::
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350 Your callback function will be called synchronously with
404aca6160f0 warning about deadlock in python
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351 the core of Orthanc. This implies that deadlocks might emerge if
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352 you call other core primitives of Orthanc in your callback (such
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353 deadlocks are particular visible in the presence of other plugins
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354 or Lua scripts). It is thus strongly advised to avoid any call to
404aca6160f0 warning about deadlock in python
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355 the REST API of Orthanc in the callback. If you have to call other
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diff changeset
356 primitives of Orthanc, you should make these calls in a separate
404aca6160f0 warning about deadlock in python
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357 thread, passing the pending events to be processed through a
404aca6160f0 warning about deadlock in python
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358 message queue.
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diff changeset
359
404aca6160f0 warning about deadlock in python
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diff changeset
360
346
bdf8757449e3 more python samples
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361 Calling pydicom
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362 ...............
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363
bdf8757449e3 more python samples
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364 Here is a sample Python plugin that registers a REST callback to dump
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365 the content of the dataset of one given DICOM instance stored in
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366 Orthanc, using `pydicom <https://pydicom.github.io/>`__:
346
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367
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368 .. literalinclude:: python/pydicom.py
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369 :language: python
346
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370
bdf8757449e3 more python samples
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371 .. highlight:: bash
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372
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373 This callback can be called as follows::
346
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374
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375 $ curl http://localhost:8042/pydicom/19816330-cb02e1cf-df3a8fe8-bf510623-ccefe9f5
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376
347
04fae9d4b65f auto-routing
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377
04fae9d4b65f auto-routing
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parents: 346
diff changeset
378 Auto-routing studies
04fae9d4b65f auto-routing
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parents: 346
diff changeset
379 ....................
04fae9d4b65f auto-routing
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380
04fae9d4b65f auto-routing
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381 Here is a sample Python plugin that routes any :ref:`stable study
642
a76d83a00c68 definition of stable resources
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382 <stable-resources>` to a modality named ``samples`` (as declared in the
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383 ``DicomModalities`` configuration option):
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diff changeset
384
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385 .. literalinclude:: python/autorouting-1.py
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386 :language: python
348
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387
539
fd5c1410db5b doc for RestApiPostAfterPlugins
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388 Note that, if you want to use an orthanc plugin to transfer the study,
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diff changeset
389 you should use the ``RestApiPostAfterPlugins()`` method:
539
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390
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391 .. literalinclude:: python/autorouting-2.py
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392 :language: python
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393
539
fd5c1410db5b doc for RestApiPostAfterPlugins
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parents: 528
diff changeset
394
352
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parents: 351
diff changeset
395 Rendering a thumbnail using PIL/Pillow
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diff changeset
396 ......................................
348
d8359cecdc89 pillow sample
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397
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398 .. literalinclude:: python/pil.py
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399 :language: python
351
e2863083fa30 multiprocessing
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400
e2863083fa30 multiprocessing
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401
369
181b02cea7ab inspecting Python API
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402 .. _python-introspection:
181b02cea7ab inspecting Python API
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parents: 364
diff changeset
403
181b02cea7ab inspecting Python API
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404 Inspecting the available API
181b02cea7ab inspecting Python API
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405 ............................
181b02cea7ab inspecting Python API
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parents: 364
diff changeset
406
181b02cea7ab inspecting Python API
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diff changeset
407 Thanks to Python's introspection primitives, it is possible to inspect
181b02cea7ab inspecting Python API
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diff changeset
408 the API of the ``orthanc`` module in order to dump all the available
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409 features:
369
181b02cea7ab inspecting Python API
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diff changeset
410
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411 .. literalinclude:: python/inspect-api.py
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412 :language: python
369
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parents: 364
diff changeset
413
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414
373
847996394688 Scheduling a task for periodic execution
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415 .. _python-scheduler:
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416
847996394688 Scheduling a task for periodic execution
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diff changeset
417 Scheduling a task for periodic execution
847996394688 Scheduling a task for periodic execution
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diff changeset
418 ........................................
847996394688 Scheduling a task for periodic execution
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diff changeset
419
847996394688 Scheduling a task for periodic execution
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420 The following Python script will periodically (every second) run the
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421 function ``Hello()`` thanks to the ``threading`` module:
373
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diff changeset
422
704
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Sebastien Jodogne <s.jodogne@gmail.com>
parents: 703
diff changeset
423 .. literalinclude:: python/periodic-execution.py
ba2403ebd4b7 moving python samples in separate files (3)
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 703
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424 :language: python
373
847996394688 Scheduling a task for periodic execution
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 369
diff changeset
425
378
16dc3561b41e Filtering and returning metadata using Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 375
diff changeset
426
16dc3561b41e Filtering and returning metadata using Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 375
diff changeset
427 .. _python-metadata:
16dc3561b41e Filtering and returning metadata using Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 375
diff changeset
428
16dc3561b41e Filtering and returning metadata using Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 375
diff changeset
429 Filtering and returning metadata
16dc3561b41e Filtering and returning metadata using Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 375
diff changeset
430 ................................
16dc3561b41e Filtering and returning metadata using Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 375
diff changeset
431
16dc3561b41e Filtering and returning metadata using Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 375
diff changeset
432 Besides the main DICOM tags, Orthanc associates some metadata to each
16dc3561b41e Filtering and returning metadata using Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 375
diff changeset
433 resource it stores (this includes the date of last update, the
16dc3561b41e Filtering and returning metadata using Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 375
diff changeset
434 transfer syntax, the remote AET...). People are often interested in
16dc3561b41e Filtering and returning metadata using Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 375
diff changeset
435 getting such metadata while calling the ``/tools/find`` route in the
16dc3561b41e Filtering and returning metadata using Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 375
diff changeset
436 :ref:`REST API <rest-find>`, or even in filtering this metadata the
16dc3561b41e Filtering and returning metadata using Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 375
diff changeset
437 same way they look for DICOM tags.
16dc3561b41e Filtering and returning metadata using Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 375
diff changeset
438
16dc3561b41e Filtering and returning metadata using Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 375
diff changeset
439 This feature is not built in the core of Orthanc, as metadata is not
16dc3561b41e Filtering and returning metadata using Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 375
diff changeset
440 indexed in the Orthanc database, contrarily to the main DICOM
16dc3561b41e Filtering and returning metadata using Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 375
diff changeset
441 tags. Filtering metadata requires a linear search over all the
16dc3561b41e Filtering and returning metadata using Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 375
diff changeset
442 matching resources, which induces a cost in the performance.
16dc3561b41e Filtering and returning metadata using Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 375
diff changeset
443
16dc3561b41e Filtering and returning metadata using Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 375
diff changeset
444 Nevertheless, here is a full sample Python script that overwrites the
704
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Sebastien Jodogne <s.jodogne@gmail.com>
parents: 703
diff changeset
445 ``/tools/find`` route in order to give access to metadata:
378
16dc3561b41e Filtering and returning metadata using Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 375
diff changeset
446
704
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Sebastien Jodogne <s.jodogne@gmail.com>
parents: 703
diff changeset
447 .. literalinclude:: python/filtering-metadata.py
ba2403ebd4b7 moving python samples in separate files (3)
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 703
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448 :language: python
378
16dc3561b41e Filtering and returning metadata using Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 375
diff changeset
449
16dc3561b41e Filtering and returning metadata using Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 375
diff changeset
450
16dc3561b41e Filtering and returning metadata using Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 375
diff changeset
451 **Warning:** In the sample above, the filtering of the metadata is
16dc3561b41e Filtering and returning metadata using Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 375
diff changeset
452 done using Python's `library for regular expressions
16dc3561b41e Filtering and returning metadata using Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 375
diff changeset
453 <https://docs.python.org/3/library/re.html>`__. It is evidently
16dc3561b41e Filtering and returning metadata using Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 375
diff changeset
454 possible to adapt this script in order to use the DICOM conventions
16dc3561b41e Filtering and returning metadata using Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 375
diff changeset
455 about `attribute matching
16dc3561b41e Filtering and returning metadata using Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 375
diff changeset
456 <http://dicom.nema.org/medical/dicom/2019e/output/chtml/part04/sect_C.2.2.2.html>`__.
16dc3561b41e Filtering and returning metadata using Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 375
diff changeset
457
469
46949efa5818 Implementing basic paging using a Python script
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 462
diff changeset
458 .. highlight:: bash
378
16dc3561b41e Filtering and returning metadata using Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 375
diff changeset
459
16dc3561b41e Filtering and returning metadata using Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 375
diff changeset
460 Here is a sample call to retrieve all the studies that were last
16dc3561b41e Filtering and returning metadata using Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 375
diff changeset
461 updated in 2019 thanks to this Python script::
16dc3561b41e Filtering and returning metadata using Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 375
diff changeset
462
16dc3561b41e Filtering and returning metadata using Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 375
diff changeset
463 $ curl http://localhost:8042/tools/find -d '{"Level":"Study","Query":{},"Expand":true,"Metadata":{"LastUpdate":"^2019.*$"}}'
369
181b02cea7ab inspecting Python API
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 364
diff changeset
464
181b02cea7ab inspecting Python API
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 364
diff changeset
465
469
46949efa5818 Implementing basic paging using a Python script
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 462
diff changeset
466 .. _python-paging:
46949efa5818 Implementing basic paging using a Python script
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 462
diff changeset
467
46949efa5818 Implementing basic paging using a Python script
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 462
diff changeset
468 Implementing basic paging
46949efa5818 Implementing basic paging using a Python script
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 462
diff changeset
469 .........................
46949efa5818 Implementing basic paging using a Python script
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 462
diff changeset
470
46949efa5818 Implementing basic paging using a Python script
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 462
diff changeset
471 As explained in the FAQ, the :ref:`Orthanc Explorer interface is
46949efa5818 Implementing basic paging using a Python script
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 462
diff changeset
472 low-level <improving-interface>`, and is not adapted for
46949efa5818 Implementing basic paging using a Python script
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 462
diff changeset
473 end-users. One common need is to implement paging of studies, which
46949efa5818 Implementing basic paging using a Python script
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 462
diff changeset
474 calls for server-side sorting of studies. This can be done using the
46949efa5818 Implementing basic paging using a Python script
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 462
diff changeset
475 following sample Python plugin that registers a new route
704
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Sebastien Jodogne <s.jodogne@gmail.com>
parents: 703
diff changeset
476 ``/sort-studies`` in the REST API of Orthanc:
469
46949efa5818 Implementing basic paging using a Python script
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 462
diff changeset
477
704
ba2403ebd4b7 moving python samples in separate files (3)
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 703
diff changeset
478 .. literalinclude:: python/paging.py
ba2403ebd4b7 moving python samples in separate files (3)
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 703
diff changeset
479 :language: python
469
46949efa5818 Implementing basic paging using a Python script
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 462
diff changeset
480
46949efa5818 Implementing basic paging using a Python script
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 462
diff changeset
481 .. highlight:: bash
46949efa5818 Implementing basic paging using a Python script
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 462
diff changeset
482
46949efa5818 Implementing basic paging using a Python script
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 462
diff changeset
483 Here is a sample call to this new REST route, that could be issued by
46949efa5818 Implementing basic paging using a Python script
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 462
diff changeset
484 any JavaScript framework (the ``json_pp`` command-line pretty-prints a
46949efa5818 Implementing basic paging using a Python script
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 462
diff changeset
485 JSON file)::
46949efa5818 Implementing basic paging using a Python script
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 462
diff changeset
486
46949efa5818 Implementing basic paging using a Python script
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 462
diff changeset
487 $ curl http://localhost:8042/sort-studies | json_pp
46949efa5818 Implementing basic paging using a Python script
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 462
diff changeset
488
46949efa5818 Implementing basic paging using a Python script
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 462
diff changeset
489 This route also implement paging (i.e. it can limit and offset the
46949efa5818 Implementing basic paging using a Python script
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 462
diff changeset
490 returned studies)::
46949efa5818 Implementing basic paging using a Python script
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 462
diff changeset
491
46949efa5818 Implementing basic paging using a Python script
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 462
diff changeset
492 $ curl 'http://localhost:8042/sort-studies?offset=2&limit=2' | json_pp
46949efa5818 Implementing basic paging using a Python script
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 462
diff changeset
493
46949efa5818 Implementing basic paging using a Python script
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 462
diff changeset
494 Obviously, this basic sample can be improved in many ways. To improve
46949efa5818 Implementing basic paging using a Python script
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 462
diff changeset
495 performance, one could for instance cache the result of
46949efa5818 Implementing basic paging using a Python script
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 462
diff changeset
496 ``/studies?expand`` in memory by :ref:`listening to changes
46949efa5818 Implementing basic paging using a Python script
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 462
diff changeset
497 <python-changes>` in the list of studies
46949efa5818 Implementing basic paging using a Python script
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 462
diff changeset
498 (cf. ``orthanc.ChangeType.NEW_STUDY`` and
46949efa5818 Implementing basic paging using a Python script
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 462
diff changeset
499 ``orthanc.ChangeType.DELETED``).
46949efa5818 Implementing basic paging using a Python script
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 462
diff changeset
500
46949efa5818 Implementing basic paging using a Python script
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 462
diff changeset
501
551
d0332c5a2cb8 Python plugin: excel generation example
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 539
diff changeset
502 .. _python_excel:
d0332c5a2cb8 Python plugin: excel generation example
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 539
diff changeset
503
d0332c5a2cb8 Python plugin: excel generation example
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 539
diff changeset
504 Creating a Microsoft Excel report
d0332c5a2cb8 Python plugin: excel generation example
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 539
diff changeset
505 .................................
d0332c5a2cb8 Python plugin: excel generation example
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 539
diff changeset
506
d0332c5a2cb8 Python plugin: excel generation example
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 539
diff changeset
507 As Orthanc plugins have access to any installed Python module, it is
d0332c5a2cb8 Python plugin: excel generation example
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 539
diff changeset
508 very easy to implement a server-side plugin that generates a report in
704
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Sebastien Jodogne <s.jodogne@gmail.com>
parents: 703
diff changeset
509 the Microsoft Excel ``.xls`` format. Here is a working example:
551
d0332c5a2cb8 Python plugin: excel generation example
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 539
diff changeset
510
704
ba2403ebd4b7 moving python samples in separate files (3)
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 703
diff changeset
511 .. literalinclude:: python/excel.py
ba2403ebd4b7 moving python samples in separate files (3)
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 703
diff changeset
512 :language: python
551
d0332c5a2cb8 Python plugin: excel generation example
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 539
diff changeset
513
d0332c5a2cb8 Python plugin: excel generation example
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 539
diff changeset
514 If opening the ``http://localhost:8042/report.xls`` URI, this Python
d0332c5a2cb8 Python plugin: excel generation example
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 539
diff changeset
515 will generate a workbook with one sheet that contains the list of
d0332c5a2cb8 Python plugin: excel generation example
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 539
diff changeset
516 studies, with the patient ID, the patient name and the study
d0332c5a2cb8 Python plugin: excel generation example
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 539
diff changeset
517 description.
d0332c5a2cb8 Python plugin: excel generation example
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 539
diff changeset
518
469
46949efa5818 Implementing basic paging using a Python script
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 462
diff changeset
519
556
6a3d48510b0b Python sample: "Forbid or allow access to REST resources (authorization)", deprecating advanced authorization plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 555
diff changeset
520 .. _python_authorization:
6a3d48510b0b Python sample: "Forbid or allow access to REST resources (authorization)", deprecating advanced authorization plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 555
diff changeset
521
697
7581dc208323 Handling DICOM SCP requests using a Python plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 696
diff changeset
522 Forbid or allow access to REST resources (authorization, new in 3.0)
7581dc208323 Handling DICOM SCP requests using a Python plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 696
diff changeset
523 ....................................................................
556
6a3d48510b0b Python sample: "Forbid or allow access to REST resources (authorization)", deprecating advanced authorization plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 555
diff changeset
524
6a3d48510b0b Python sample: "Forbid or allow access to REST resources (authorization)", deprecating advanced authorization plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 555
diff changeset
525 The following Python script installs a callback that is triggered
704
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Sebastien Jodogne <s.jodogne@gmail.com>
parents: 703
diff changeset
526 whenever the HTTP server of Orthanc is accessed:
556
6a3d48510b0b Python sample: "Forbid or allow access to REST resources (authorization)", deprecating advanced authorization plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 555
diff changeset
527
704
ba2403ebd4b7 moving python samples in separate files (3)
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 703
diff changeset
528 .. literalinclude:: python/authorization-1.py
ba2403ebd4b7 moving python samples in separate files (3)
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 703
diff changeset
529 :language: python
556
6a3d48510b0b Python sample: "Forbid or allow access to REST resources (authorization)", deprecating advanced authorization plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 555
diff changeset
530
6a3d48510b0b Python sample: "Forbid or allow access to REST resources (authorization)", deprecating advanced authorization plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 555
diff changeset
531
6a3d48510b0b Python sample: "Forbid or allow access to REST resources (authorization)", deprecating advanced authorization plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 555
diff changeset
532 If access is not granted, the ``Filter`` callback must return
6a3d48510b0b Python sample: "Forbid or allow access to REST resources (authorization)", deprecating advanced authorization plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 555
diff changeset
533 ``False``. As a consequence, the HTTP status code would be set to
6a3d48510b0b Python sample: "Forbid or allow access to REST resources (authorization)", deprecating advanced authorization plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 555
diff changeset
534 ``403 Forbidden``. If access is granted, the ``Filter`` must return
6a3d48510b0b Python sample: "Forbid or allow access to REST resources (authorization)", deprecating advanced authorization plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 555
diff changeset
535 ``true``. The ``request`` argument contains more information about the
6a3d48510b0b Python sample: "Forbid or allow access to REST resources (authorization)", deprecating advanced authorization plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 555
diff changeset
536 request (such as the HTTP headers, the IP address of the caller and
6a3d48510b0b Python sample: "Forbid or allow access to REST resources (authorization)", deprecating advanced authorization plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 555
diff changeset
537 the GET arguments).
6a3d48510b0b Python sample: "Forbid or allow access to REST resources (authorization)", deprecating advanced authorization plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 555
diff changeset
538
6a3d48510b0b Python sample: "Forbid or allow access to REST resources (authorization)", deprecating advanced authorization plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 555
diff changeset
539 Note that this is similar to the ``IncomingHttpRequestFilter()``
6a3d48510b0b Python sample: "Forbid or allow access to REST resources (authorization)", deprecating advanced authorization plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 555
diff changeset
540 callback that is available in :ref:`Lua scripts <lua-filter-rest>`.
6a3d48510b0b Python sample: "Forbid or allow access to REST resources (authorization)", deprecating advanced authorization plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 555
diff changeset
541
6a3d48510b0b Python sample: "Forbid or allow access to REST resources (authorization)", deprecating advanced authorization plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 555
diff changeset
542 Thanks to Python, it is extremely easy to call remote Web services for
704
ba2403ebd4b7 moving python samples in separate files (3)
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 703
diff changeset
543 authorization. Here is an example using the ``requests`` library:
556
6a3d48510b0b Python sample: "Forbid or allow access to REST resources (authorization)", deprecating advanced authorization plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 555
diff changeset
544
704
ba2403ebd4b7 moving python samples in separate files (3)
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 703
diff changeset
545 .. literalinclude:: python/authorization-2.py
ba2403ebd4b7 moving python samples in separate files (3)
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 703
diff changeset
546 :language: python
556
6a3d48510b0b Python sample: "Forbid or allow access to REST resources (authorization)", deprecating advanced authorization plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 555
diff changeset
547
6a3d48510b0b Python sample: "Forbid or allow access to REST resources (authorization)", deprecating advanced authorization plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 555
diff changeset
548 This filter could be used together with the following Web service
6a3d48510b0b Python sample: "Forbid or allow access to REST resources (authorization)", deprecating advanced authorization plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 555
diff changeset
549 implemented using `Node.js
704
ba2403ebd4b7 moving python samples in separate files (3)
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 703
diff changeset
550 <https://en.wikipedia.org/wiki/Node.js>`__:
556
6a3d48510b0b Python sample: "Forbid or allow access to REST resources (authorization)", deprecating advanced authorization plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 555
diff changeset
551
704
ba2403ebd4b7 moving python samples in separate files (3)
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 703
diff changeset
552 .. literalinclude:: python/authorization-node-service.js
ba2403ebd4b7 moving python samples in separate files (3)
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 703
diff changeset
553 :language: javascript
556
6a3d48510b0b Python sample: "Forbid or allow access to REST resources (authorization)", deprecating advanced authorization plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 555
diff changeset
554
6a3d48510b0b Python sample: "Forbid or allow access to REST resources (authorization)", deprecating advanced authorization plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 555
diff changeset
555
708
cd70d23f34bc Lookup DICOM dictionary in Python scripts
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 707
diff changeset
556 .. _python_lookup_dictionary:
cd70d23f34bc Lookup DICOM dictionary in Python scripts
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 707
diff changeset
557
cd70d23f34bc Lookup DICOM dictionary in Python scripts
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 707
diff changeset
558 Lookup DICOM dictionary (new in 3.2)
cd70d23f34bc Lookup DICOM dictionary in Python scripts
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 707
diff changeset
559 ....................................
cd70d23f34bc Lookup DICOM dictionary in Python scripts
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 707
diff changeset
560
cd70d23f34bc Lookup DICOM dictionary in Python scripts
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 707
diff changeset
561 Python plugins can access the dictionary of the DICOM tags that are
cd70d23f34bc Lookup DICOM dictionary in Python scripts
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 707
diff changeset
562 handled by Orthanc:
cd70d23f34bc Lookup DICOM dictionary in Python scripts
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 707
diff changeset
563
cd70d23f34bc Lookup DICOM dictionary in Python scripts
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 707
diff changeset
564 .. literalinclude:: python/lookup-dictionary.py
cd70d23f34bc Lookup DICOM dictionary in Python scripts
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 707
diff changeset
565 :language: python
cd70d23f34bc Lookup DICOM dictionary in Python scripts
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 707
diff changeset
566
cd70d23f34bc Lookup DICOM dictionary in Python scripts
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 707
diff changeset
567 .. highlight:: text
cd70d23f34bc Lookup DICOM dictionary in Python scripts
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 707
diff changeset
568
cd70d23f34bc Lookup DICOM dictionary in Python scripts
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 707
diff changeset
569 Note how Python introspection is used in order to map the values in
cd70d23f34bc Lookup DICOM dictionary in Python scripts
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 707
diff changeset
570 enumeration ``orthanc.ValueRepresentation`` to a string description of
cd70d23f34bc Lookup DICOM dictionary in Python scripts
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 707
diff changeset
571 the value representation. If started, the plugin above would output
cd70d23f34bc Lookup DICOM dictionary in Python scripts
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 707
diff changeset
572 the following information in the Orthanc logs::
cd70d23f34bc Lookup DICOM dictionary in Python scripts
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 707
diff changeset
573
cd70d23f34bc Lookup DICOM dictionary in Python scripts
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 707
diff changeset
574 W0611 14:04:08.563957 PluginsManager.cpp:168] Entry in the dictionary: {
cd70d23f34bc Lookup DICOM dictionary in Python scripts
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 707
diff changeset
575 "Element": 32,
cd70d23f34bc Lookup DICOM dictionary in Python scripts
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 707
diff changeset
576 "Group": 16,
cd70d23f34bc Lookup DICOM dictionary in Python scripts
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 707
diff changeset
577 "MaxMultiplicity": 1,
cd70d23f34bc Lookup DICOM dictionary in Python scripts
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 707
diff changeset
578 "MinMultiplicity": 1,
cd70d23f34bc Lookup DICOM dictionary in Python scripts
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 707
diff changeset
579 "ValueRepresentation": 11
cd70d23f34bc Lookup DICOM dictionary in Python scripts
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 707
diff changeset
580 }
cd70d23f34bc Lookup DICOM dictionary in Python scripts
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 707
diff changeset
581 W0611 14:04:08.563975 PluginsManager.cpp:168] Name of the value representation: LO
cd70d23f34bc Lookup DICOM dictionary in Python scripts
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 707
diff changeset
582
cd70d23f34bc Lookup DICOM dictionary in Python scripts
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 707
diff changeset
583
695
f4fc12ed00ee creating dicom instances in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 678
diff changeset
584 .. _python_create_dicom:
556
6a3d48510b0b Python sample: "Forbid or allow access to REST resources (authorization)", deprecating advanced authorization plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 555
diff changeset
585
696
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 695
diff changeset
586 Creating DICOM instances (new in 3.2)
695
f4fc12ed00ee creating dicom instances in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 678
diff changeset
587 .....................................
f4fc12ed00ee creating dicom instances in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 678
diff changeset
588
f4fc12ed00ee creating dicom instances in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 678
diff changeset
589 The following sample Python script will write on the disk a new DICOM
f4fc12ed00ee creating dicom instances in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 678
diff changeset
590 instance including the traditional Lena sample image, and will decode
704
ba2403ebd4b7 moving python samples in separate files (3)
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 703
diff changeset
591 the single frame of this DICOM instance:
695
f4fc12ed00ee creating dicom instances in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 678
diff changeset
592
704
ba2403ebd4b7 moving python samples in separate files (3)
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 703
diff changeset
593 .. literalinclude:: python/create-dicom.py
ba2403ebd4b7 moving python samples in separate files (3)
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 703
diff changeset
594 :language: python
695
f4fc12ed00ee creating dicom instances in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 678
diff changeset
595
f4fc12ed00ee creating dicom instances in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 678
diff changeset
596
706
c62539d00251 Conversions between Orthanc and Python images
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 704
diff changeset
597 .. _python_pil_conversions:
c62539d00251 Conversions between Orthanc and Python images
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 704
diff changeset
598
c62539d00251 Conversions between Orthanc and Python images
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 704
diff changeset
599 Conversions between Orthanc and Python images (new in 3.2)
c62539d00251 Conversions between Orthanc and Python images
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 704
diff changeset
600 ..........................................................
c62539d00251 Conversions between Orthanc and Python images
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 704
diff changeset
601
c62539d00251 Conversions between Orthanc and Python images
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 704
diff changeset
602 The Python method ``orthanc.Image.GetImageBuffer()`` returns a copy of
c62539d00251 Conversions between Orthanc and Python images
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 704
diff changeset
603 the memory buffer of an image that is handled Orthanc. Conversely, the
c62539d00251 Conversions between Orthanc and Python images
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 704
diff changeset
604 Python function ``orthanc.CreateImageFromBuffer()`` can be used to
c62539d00251 Conversions between Orthanc and Python images
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 704
diff changeset
605 create an Orthanc image from a Python buffer. Taken together, these
c62539d00251 Conversions between Orthanc and Python images
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 704
diff changeset
606 two functions can be used to do bidirectional conversions between
c62539d00251 Conversions between Orthanc and Python images
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 704
diff changeset
607 Orthanc images and Python images.
c62539d00251 Conversions between Orthanc and Python images
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 704
diff changeset
608
c62539d00251 Conversions between Orthanc and Python images
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 704
diff changeset
609 Here is a full working example using PIL/Pillow that shows how to
707
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 706
diff changeset
610 decode one frame of a DICOM instance using Orthanc, then to modify
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 706
diff changeset
611 this image using PIL, and finally to upload the modified image as a
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 706
diff changeset
612 new DICOM instance:
706
c62539d00251 Conversions between Orthanc and Python images
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 704
diff changeset
613
c62539d00251 Conversions between Orthanc and Python images
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 704
diff changeset
614 .. literalinclude:: python/pil-conversions.py
c62539d00251 Conversions between Orthanc and Python images
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 704
diff changeset
615 :language: python
c62539d00251 Conversions between Orthanc and Python images
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 704
diff changeset
616
c62539d00251 Conversions between Orthanc and Python images
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 704
diff changeset
617
697
7581dc208323 Handling DICOM SCP requests using a Python plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 696
diff changeset
618 .. _python_dicom_scp:
695
f4fc12ed00ee creating dicom instances in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 678
diff changeset
619
697
7581dc208323 Handling DICOM SCP requests using a Python plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 696
diff changeset
620 Handling DICOM SCP requests (new in 3.2)
7581dc208323 Handling DICOM SCP requests using a Python plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 696
diff changeset
621 ........................................
7581dc208323 Handling DICOM SCP requests using a Python plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 696
diff changeset
622
7581dc208323 Handling DICOM SCP requests using a Python plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 696
diff changeset
623 Starting with release 3.2 of the Python plugin, it is possible to
7581dc208323 Handling DICOM SCP requests using a Python plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 696
diff changeset
624 replace the C-FIND SCP and C-MOVE SCP of Orthanc by a Python
7581dc208323 Handling DICOM SCP requests using a Python plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 696
diff changeset
625 script. This feature can notably be used to create a custom DICOM
704
ba2403ebd4b7 moving python samples in separate files (3)
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 703
diff changeset
626 proxy. Here is a minimal example:
697
7581dc208323 Handling DICOM SCP requests using a Python plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 696
diff changeset
627
704
ba2403ebd4b7 moving python samples in separate files (3)
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 703
diff changeset
628 .. literalinclude:: python/dicom-find-move-scp.py
ba2403ebd4b7 moving python samples in separate files (3)
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 703
diff changeset
629 :language: python
ba2403ebd4b7 moving python samples in separate files (3)
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 703
diff changeset
630
697
7581dc208323 Handling DICOM SCP requests using a Python plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 696
diff changeset
631
7581dc208323 Handling DICOM SCP requests using a Python plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 696
diff changeset
632 .. highlight:: text
7581dc208323 Handling DICOM SCP requests using a Python plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 696
diff changeset
633
7581dc208323 Handling DICOM SCP requests using a Python plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 696
diff changeset
634 In this sample, the C-FIND SCP will send one single answer that
7581dc208323 Handling DICOM SCP requests using a Python plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 696
diff changeset
635 reproduces the values provided by the SCU::
7581dc208323 Handling DICOM SCP requests using a Python plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 696
diff changeset
636
699
a777b9e6ef70 clarifying sample
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 698
diff changeset
637 $ findscu localhost 4242 -S -k QueryRetrieveLevel=STUDY -k PatientName=TEST -k SeriesDescription=
697
7581dc208323 Handling DICOM SCP requests using a Python plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 696
diff changeset
638 I: ---------------------------
7581dc208323 Handling DICOM SCP requests using a Python plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 696
diff changeset
639 I: Find Response: 1 (Pending)
7581dc208323 Handling DICOM SCP requests using a Python plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 696
diff changeset
640 I:
7581dc208323 Handling DICOM SCP requests using a Python plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 696
diff changeset
641 I: # Dicom-Data-Set
7581dc208323 Handling DICOM SCP requests using a Python plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 696
diff changeset
642 I: # Used TransferSyntax: Little Endian Explicit
7581dc208323 Handling DICOM SCP requests using a Python plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 696
diff changeset
643 I: (0008,0005) CS [ISO_IR 100] # 10, 1 SpecificCharacterSet
7581dc208323 Handling DICOM SCP requests using a Python plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 696
diff changeset
644 I: (0008,0052) CS [HELLO0-STUDY] # 12, 1 QueryRetrieveLevel
7581dc208323 Handling DICOM SCP requests using a Python plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 696
diff changeset
645 I: (0008,103e) LO [HELLO1- ] # 8, 1 SeriesDescription
7581dc208323 Handling DICOM SCP requests using a Python plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 696
diff changeset
646 I: (0010,0010) PN [HELLO2-TEST ] # 12, 1 PatientName
7581dc208323 Handling DICOM SCP requests using a Python plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 696
diff changeset
647 I:
7581dc208323 Handling DICOM SCP requests using a Python plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 696
diff changeset
648
698
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 697
diff changeset
649 A more realistic Python script could for instance call the route
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 697
diff changeset
650 ``/modalities/{...}/query`` in the :ref:`REST API <rest-find-scu>` of
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 697
diff changeset
651 Orthanc using ``orthanc.RestApiPost()``, in order to query the content
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 697
diff changeset
652 a remote modality through a second C-FIND SCU request (this time
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 697
diff changeset
653 issued by Orthanc as a SCU).
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 697
diff changeset
654
697
7581dc208323 Handling DICOM SCP requests using a Python plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 696
diff changeset
655 The C-MOVE SCP can be invoked as follows::
7581dc208323 Handling DICOM SCP requests using a Python plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 696
diff changeset
656
699
a777b9e6ef70 clarifying sample
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 698
diff changeset
657 $ movescu localhost 4242 -aem TARGET -aec SOURCE -aet MOVESCU -S -k QueryRetrieveLevel=IMAGE -k StudyInstanceUID=1.2.3.4
697
7581dc208323 Handling DICOM SCP requests using a Python plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 696
diff changeset
658
7581dc208323 Handling DICOM SCP requests using a Python plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 696
diff changeset
659 The C-MOVE request above would print the following information in the
7581dc208323 Handling DICOM SCP requests using a Python plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 696
diff changeset
660 Orthanc logs::
7581dc208323 Handling DICOM SCP requests using a Python plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 696
diff changeset
661
7581dc208323 Handling DICOM SCP requests using a Python plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 696
diff changeset
662 W0610 18:30:36.840865 PluginsManager.cpp:168] C-MOVE request to be handled in Python: {
7581dc208323 Handling DICOM SCP requests using a Python plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 696
diff changeset
663 "AccessionNumber": "",
7581dc208323 Handling DICOM SCP requests using a Python plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 696
diff changeset
664 "Level": "INSTANCE",
699
a777b9e6ef70 clarifying sample
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 698
diff changeset
665 "OriginatorAET": "MOVESCU",
697
7581dc208323 Handling DICOM SCP requests using a Python plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 696
diff changeset
666 "OriginatorID": 1,
7581dc208323 Handling DICOM SCP requests using a Python plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 696
diff changeset
667 "PatientID": "",
7581dc208323 Handling DICOM SCP requests using a Python plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 696
diff changeset
668 "SOPInstanceUID": "",
7581dc208323 Handling DICOM SCP requests using a Python plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 696
diff changeset
669 "SeriesInstanceUID": "",
699
a777b9e6ef70 clarifying sample
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 698
diff changeset
670 "SourceAET": "SOURCE",
697
7581dc208323 Handling DICOM SCP requests using a Python plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 696
diff changeset
671 "StudyInstanceUID": "1.2.3.4",
7581dc208323 Handling DICOM SCP requests using a Python plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 696
diff changeset
672 "TargetAET": "TARGET"
7581dc208323 Handling DICOM SCP requests using a Python plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 696
diff changeset
673 }
7581dc208323 Handling DICOM SCP requests using a Python plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 696
diff changeset
674
710
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 709
diff changeset
675 It is now up to your Python callback to process the C-MOVE SCU request,
697
7581dc208323 Handling DICOM SCP requests using a Python plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 696
diff changeset
676 for instance by calling the route ``/modalities/{...}/store`` in the
7581dc208323 Handling DICOM SCP requests using a Python plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 696
diff changeset
677 :ref:`REST API <rest-store-scu>` of Orthanc using
700
56a06ca9ec20 Handling worklist SCP requests in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 699
diff changeset
678 ``orthanc.RestApiPost()``. It is highly advised to create a Python
56a06ca9ec20 Handling worklist SCP requests in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 699
diff changeset
679 thread to handle the request, in order to avoid blocking Orthanc as
56a06ca9ec20 Handling worklist SCP requests in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 699
diff changeset
680 much as possible.
56a06ca9ec20 Handling worklist SCP requests in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 699
diff changeset
681
56a06ca9ec20 Handling worklist SCP requests in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 699
diff changeset
682
56a06ca9ec20 Handling worklist SCP requests in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 699
diff changeset
683 .. _python_worklists:
56a06ca9ec20 Handling worklist SCP requests in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 699
diff changeset
684
56a06ca9ec20 Handling worklist SCP requests in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 699
diff changeset
685 Handling worklist SCP requests (new in 3.2)
56a06ca9ec20 Handling worklist SCP requests in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 699
diff changeset
686 ...........................................
56a06ca9ec20 Handling worklist SCP requests in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 699
diff changeset
687
56a06ca9ec20 Handling worklist SCP requests in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 699
diff changeset
688 Starting with release 3.2 of the Python plugin, it is possible to
701
f093160dd7f4 cross-references regarding worklists
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 700
diff changeset
689 answer :ref:`worklist queries <worklist>` using a Python script. This
f093160dd7f4 cross-references regarding worklists
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 700
diff changeset
690 is especially useful to easily create a bridge between Orthanc,
f093160dd7f4 cross-references regarding worklists
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 700
diff changeset
691 HL7/FHIR messages and RIS systems. Indeed, Python provides many tools
f093160dd7f4 cross-references regarding worklists
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 700
diff changeset
692 to handle HL7 such as `python-hl7 library
f093160dd7f4 cross-references regarding worklists
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 700
diff changeset
693 <https://python-hl7.readthedocs.io/en/latest/>`__.
700
56a06ca9ec20 Handling worklist SCP requests in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 699
diff changeset
694
973
2d817288cad4 added python storage commitment
Alain Mazy <am@osimis.io>
parents: 963
diff changeset
695 The following Python script reproduces features similar to the
700
56a06ca9ec20 Handling worklist SCP requests in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 699
diff changeset
696 :ref:`sample modality worklists plugin <worklists-plugin>`:
56a06ca9ec20 Handling worklist SCP requests in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 699
diff changeset
697
56a06ca9ec20 Handling worklist SCP requests in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 699
diff changeset
698 .. literalinclude:: python/worklist.py
56a06ca9ec20 Handling worklist SCP requests in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 699
diff changeset
699 :language: python
56a06ca9ec20 Handling worklist SCP requests in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 699
diff changeset
700
701
f093160dd7f4 cross-references regarding worklists
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 700
diff changeset
701 .. highlight:: text
f093160dd7f4 cross-references regarding worklists
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 700
diff changeset
702
f093160dd7f4 cross-references regarding worklists
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 700
diff changeset
703 Here is the result of this plugin on a sample call::
f093160dd7f4 cross-references regarding worklists
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 700
diff changeset
704
f093160dd7f4 cross-references regarding worklists
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 700
diff changeset
705 $ findscu -W -k "ScheduledProcedureStepSequence[0].Modality=MR" 127.0.0.1 4242
f093160dd7f4 cross-references regarding worklists
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 700
diff changeset
706 I: ---------------------------
f093160dd7f4 cross-references regarding worklists
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 700
diff changeset
707 I: Find Response: 1 (Pending)
f093160dd7f4 cross-references regarding worklists
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 700
diff changeset
708 I:
f093160dd7f4 cross-references regarding worklists
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 700
diff changeset
709 I: # Dicom-Data-Set
f093160dd7f4 cross-references regarding worklists
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 700
diff changeset
710 I: # Used TransferSyntax: Little Endian Explicit
f093160dd7f4 cross-references regarding worklists
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 700
diff changeset
711 I: (0008,0005) CS [ISO_IR 100] # 10, 1 SpecificCharacterSet
f093160dd7f4 cross-references regarding worklists
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 700
diff changeset
712 I: (0040,0100) SQ (Sequence with explicit length #=1) # 18, 1 ScheduledProcedureStepSequence
f093160dd7f4 cross-references regarding worklists
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 700
diff changeset
713 I: (fffe,e000) na (Item with explicit length #=1) # 10, 1 Item
f093160dd7f4 cross-references regarding worklists
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 700
diff changeset
714 I: (0008,0060) CS [MR] # 2, 1 Modality
f093160dd7f4 cross-references regarding worklists
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 700
diff changeset
715 I: (fffe,e00d) na (ItemDelimitationItem for re-encoding) # 0, 0 ItemDelimitationItem
f093160dd7f4 cross-references regarding worklists
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 700
diff changeset
716 I: (fffe,e0dd) na (SequenceDelimitationItem for re-encod.) # 0, 0 SequenceDelimitationItem
f093160dd7f4 cross-references regarding worklists
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 700
diff changeset
717 I:
f093160dd7f4 cross-references regarding worklists
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 700
diff changeset
718 I: ---------------------------
f093160dd7f4 cross-references regarding worklists
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 700
diff changeset
719 I: Find Response: 2 (Pending)
f093160dd7f4 cross-references regarding worklists
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 700
diff changeset
720 I:
f093160dd7f4 cross-references regarding worklists
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 700
diff changeset
721 I: # Dicom-Data-Set
f093160dd7f4 cross-references regarding worklists
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 700
diff changeset
722 I: # Used TransferSyntax: Little Endian Explicit
f093160dd7f4 cross-references regarding worklists
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 700
diff changeset
723 I: (0008,0005) CS [ISO_IR 100] # 10, 1 SpecificCharacterSet
f093160dd7f4 cross-references regarding worklists
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 700
diff changeset
724 I: (0040,0100) SQ (Sequence with explicit length #=1) # 18, 1 ScheduledProcedureStepSequence
f093160dd7f4 cross-references regarding worklists
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 700
diff changeset
725 I: (fffe,e000) na (Item with explicit length #=1) # 10, 1 Item
f093160dd7f4 cross-references regarding worklists
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 700
diff changeset
726 I: (0008,0060) CS [MR] # 2, 1 Modality
f093160dd7f4 cross-references regarding worklists
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 700
diff changeset
727 I: (fffe,e00d) na (ItemDelimitationItem for re-encoding) # 0, 0 ItemDelimitationItem
f093160dd7f4 cross-references regarding worklists
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 700
diff changeset
728 I: (fffe,e0dd) na (SequenceDelimitationItem for re-encod.) # 0, 0 SequenceDelimitationItem
f093160dd7f4 cross-references regarding worklists
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 700
diff changeset
729 I:
f093160dd7f4 cross-references regarding worklists
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 700
diff changeset
730
727
698eb280060a pynetdicom sample
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 719
diff changeset
731
698eb280060a pynetdicom sample
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 719
diff changeset
732 .. _pynetdicom:
698eb280060a pynetdicom sample
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 719
diff changeset
733
698eb280060a pynetdicom sample
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 719
diff changeset
734 Replacing DICOM SCP of Orthanc by pynetdicom
698eb280060a pynetdicom sample
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 719
diff changeset
735 ............................................
698eb280060a pynetdicom sample
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 719
diff changeset
736
698eb280060a pynetdicom sample
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 719
diff changeset
737 .. highlight:: json
698eb280060a pynetdicom sample
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 719
diff changeset
738
698eb280060a pynetdicom sample
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 719
diff changeset
739 Thanks to Python plugins, it is also possible to replace the built-in
698eb280060a pynetdicom sample
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 719
diff changeset
740 DICOM SCP of Orthanc by `pynetdicom
698eb280060a pynetdicom sample
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 719
diff changeset
741 <https://pydicom.github.io/pynetdicom/stable/examples/storage.html>`__
698eb280060a pynetdicom sample
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 719
diff changeset
742 so as to customize how the DICOM protocol is handled. Firstly, in the
698eb280060a pynetdicom sample
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 719
diff changeset
743 configuration file, make sure to disable the Orthanc SCP by setting
698eb280060a pynetdicom sample
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 719
diff changeset
744 ``DicomServerEnabled`` to ``false``::
698eb280060a pynetdicom sample
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 719
diff changeset
745
698eb280060a pynetdicom sample
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 719
diff changeset
746 {
698eb280060a pynetdicom sample
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 719
diff changeset
747 "Plugins" : [ "." ],
698eb280060a pynetdicom sample
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 719
diff changeset
748 "PythonScript" : "pynetdicom.py",
698eb280060a pynetdicom sample
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 719
diff changeset
749 "DicomServerEnabled" : false
698eb280060a pynetdicom sample
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 719
diff changeset
750 }
698eb280060a pynetdicom sample
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 719
diff changeset
751
698eb280060a pynetdicom sample
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 719
diff changeset
752 Secondly, here a basic plugin illustrating how to start and stop the
698eb280060a pynetdicom sample
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 719
diff changeset
753 pynetdicom server, and handle incoming C-STORE requests:
698eb280060a pynetdicom sample
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 719
diff changeset
754
698eb280060a pynetdicom sample
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 719
diff changeset
755 .. literalinclude:: python/pynetdicom.py
698eb280060a pynetdicom sample
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 719
diff changeset
756 :language: python
698eb280060a pynetdicom sample
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 719
diff changeset
757
698eb280060a pynetdicom sample
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 719
diff changeset
758 As can be seen in this listing, whenever the pynetdicom receives an
698eb280060a pynetdicom sample
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 719
diff changeset
759 incoming C-STORE request, it makes a POST call to the URI
698eb280060a pynetdicom sample
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 719
diff changeset
760 ``/instances`` in the REST API of Orthanc in order to store the
698eb280060a pynetdicom sample
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 719
diff changeset
761 embedded DICOM dataset into Orthanc. Obviously, one can build more
698eb280060a pynetdicom sample
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 719
diff changeset
762 complex DICOM servers by handling more messages than C-STORE alone.
698eb280060a pynetdicom sample
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 719
diff changeset
763
747
56d48f6e52cc catching exceptions in python plugins
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 741
diff changeset
764
56d48f6e52cc catching exceptions in python plugins
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 741
diff changeset
765 .. _python_exception:
56d48f6e52cc catching exceptions in python plugins
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 741
diff changeset
766
56d48f6e52cc catching exceptions in python plugins
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 741
diff changeset
767 Catching exceptions
56d48f6e52cc catching exceptions in python plugins
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 741
diff changeset
768 ...................
56d48f6e52cc catching exceptions in python plugins
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 741
diff changeset
769
56d48f6e52cc catching exceptions in python plugins
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 741
diff changeset
770 Starting with release 3.3 of the Python plugin, the plugin generates a
56d48f6e52cc catching exceptions in python plugins
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 741
diff changeset
771 Python exception derived from class ``orthanc.OrthancException`` if an
56d48f6e52cc catching exceptions in python plugins
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 741
diff changeset
772 error is encountered. This exception contains a tuple that provides
56d48f6e52cc catching exceptions in python plugins
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 741
diff changeset
773 the error code and its textual description.
56d48f6e52cc catching exceptions in python plugins
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 741
diff changeset
774
56d48f6e52cc catching exceptions in python plugins
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 741
diff changeset
775 In releases <= 3.2, the Python plugin raised the `built-in exception
56d48f6e52cc catching exceptions in python plugins
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 741
diff changeset
776 <https://docs.python.org/3/library/exceptions.html>`__ ``ValueError``.
56d48f6e52cc catching exceptions in python plugins
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 741
diff changeset
777
56d48f6e52cc catching exceptions in python plugins
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 741
diff changeset
778 Here is an example showing how to catch exceptions:
56d48f6e52cc catching exceptions in python plugins
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 741
diff changeset
779
56d48f6e52cc catching exceptions in python plugins
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 741
diff changeset
780 .. literalinclude:: python/exception.py
56d48f6e52cc catching exceptions in python plugins
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 741
diff changeset
781 :language: python
56d48f6e52cc catching exceptions in python plugins
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 741
diff changeset
782
556
6a3d48510b0b Python sample: "Forbid or allow access to REST resources (authorization)", deprecating advanced authorization plugin
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 555
diff changeset
783
748
a296fe06fd86 Implementing a custom storage area in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 747
diff changeset
784 .. _python_storage_area:
a296fe06fd86 Implementing a custom storage area in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 747
diff changeset
785
a296fe06fd86 Implementing a custom storage area in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 747
diff changeset
786 Implementing a custom storage area (new in 3.3)
a296fe06fd86 Implementing a custom storage area in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 747
diff changeset
787 ...............................................
a296fe06fd86 Implementing a custom storage area in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 747
diff changeset
788
a296fe06fd86 Implementing a custom storage area in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 747
diff changeset
789 Starting with release 3.3 of the Python plugin, it is possible to
a296fe06fd86 Implementing a custom storage area in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 747
diff changeset
790 replace the built-in storage area of Orthanc (that writes
a296fe06fd86 Implementing a custom storage area in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 747
diff changeset
791 :ref:`attachments <metadata>` onto the filesystem in the
a296fe06fd86 Implementing a custom storage area in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 747
diff changeset
792 ``OrthancStorage`` folder by default), by providing 3 Python callbacks
a296fe06fd86 Implementing a custom storage area in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 747
diff changeset
793 to the ``orthanc.RegisterStorageArea()`` function:
a296fe06fd86 Implementing a custom storage area in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 747
diff changeset
794
a296fe06fd86 Implementing a custom storage area in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 747
diff changeset
795 * The first callback indicates how to **create** an attachment into
a296fe06fd86 Implementing a custom storage area in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 747
diff changeset
796 the storage area.
a296fe06fd86 Implementing a custom storage area in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 747
diff changeset
797
a296fe06fd86 Implementing a custom storage area in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 747
diff changeset
798 * The second callback indicates how to **read** an attachment from the
a296fe06fd86 Implementing a custom storage area in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 747
diff changeset
799 storage area.
a296fe06fd86 Implementing a custom storage area in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 747
diff changeset
800
a296fe06fd86 Implementing a custom storage area in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 747
diff changeset
801 * The third callback indicates how to **remove** an attachment out of
a296fe06fd86 Implementing a custom storage area in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 747
diff changeset
802 the storage area.
a296fe06fd86 Implementing a custom storage area in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 747
diff changeset
803
a296fe06fd86 Implementing a custom storage area in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 747
diff changeset
804 This feature can be used to quickly and easily interface Orthanc with
a296fe06fd86 Implementing a custom storage area in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 747
diff changeset
805 any `object-based storage
a296fe06fd86 Implementing a custom storage area in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 747
diff changeset
806 <https://en.wikipedia.org/wiki/Object_storage>`__ technology available
a296fe06fd86 Implementing a custom storage area in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 747
diff changeset
807 in Python (such as `Ceph
a296fe06fd86 Implementing a custom storage area in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 747
diff changeset
808 <https://en.wikipedia.org/wiki/Ceph_(software)>`__ or AWS S3-like
a296fe06fd86 Implementing a custom storage area in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 747
diff changeset
809 tools). The performance will not be as good as a C/C++ native plugin
a296fe06fd86 Implementing a custom storage area in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 747
diff changeset
810 (cf. the :ref:`cloud storage <object-storage>`, the :ref:`PostgreSQL
a296fe06fd86 Implementing a custom storage area in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 747
diff changeset
811 <postgresql>` and the :ref:`MySQL <mysql>` plugins), but it can be
a296fe06fd86 Implementing a custom storage area in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 747
diff changeset
812 used for prototyping or for basic setups.
a296fe06fd86 Implementing a custom storage area in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 747
diff changeset
813
a296fe06fd86 Implementing a custom storage area in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 747
diff changeset
814 Here is a full, self-explaining sample:
a296fe06fd86 Implementing a custom storage area in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 747
diff changeset
815
a296fe06fd86 Implementing a custom storage area in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 747
diff changeset
816 .. literalinclude:: python/storage-area.py
a296fe06fd86 Implementing a custom storage area in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 747
diff changeset
817 :language: python
a296fe06fd86 Implementing a custom storage area in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 747
diff changeset
818
a296fe06fd86 Implementing a custom storage area in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 747
diff changeset
819 The ``contentType`` can be used to apply a special treatment to some
a296fe06fd86 Implementing a custom storage area in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 747
diff changeset
820 types of attachments (typically, DICOM instances). This parameter
a296fe06fd86 Implementing a custom storage area in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 747
diff changeset
821 takes its values from the ``orthanc.ContentType`` enumeration.
a296fe06fd86 Implementing a custom storage area in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 747
diff changeset
822
a296fe06fd86 Implementing a custom storage area in Python
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 747
diff changeset
823
799
ecf431e1bd44 python sample for ReceivedInstanceCallback
Alain Mazy <am@osimis.io>
parents: 763
diff changeset
824 .. _python_received_instance:
ecf431e1bd44 python sample for ReceivedInstanceCallback
Alain Mazy <am@osimis.io>
parents: 763
diff changeset
825
819
a67ceccebf02 releasing Python plugin 4.0
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 817
diff changeset
826 Modifying received instances (new in 4.0)
a67ceccebf02 releasing Python plugin 4.0
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 817
diff changeset
827 .........................................
799
ecf431e1bd44 python sample for ReceivedInstanceCallback
Alain Mazy <am@osimis.io>
parents: 763
diff changeset
828
819
a67ceccebf02 releasing Python plugin 4.0
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 817
diff changeset
829 Starting with release 4.0 of the Python plugin, it is possible to
799
ecf431e1bd44 python sample for ReceivedInstanceCallback
Alain Mazy <am@osimis.io>
parents: 763
diff changeset
830 modify instances received by Orthanc before they are stored in
ecf431e1bd44 python sample for ReceivedInstanceCallback
Alain Mazy <am@osimis.io>
parents: 763
diff changeset
831 the storage. This is usually easier to perform modification at this
ecf431e1bd44 python sample for ReceivedInstanceCallback
Alain Mazy <am@osimis.io>
parents: 763
diff changeset
832 stage compared to using the ``/modify`` route once the instances
ecf431e1bd44 python sample for ReceivedInstanceCallback
Alain Mazy <am@osimis.io>
parents: 763
diff changeset
833 has been stored.
ecf431e1bd44 python sample for ReceivedInstanceCallback
Alain Mazy <am@osimis.io>
parents: 763
diff changeset
834
ecf431e1bd44 python sample for ReceivedInstanceCallback
Alain Mazy <am@osimis.io>
parents: 763
diff changeset
835 .. literalinclude:: python/received-instance-callback.py
ecf431e1bd44 python sample for ReceivedInstanceCallback
Alain Mazy <am@osimis.io>
parents: 763
diff changeset
836 :language: python
ecf431e1bd44 python sample for ReceivedInstanceCallback
Alain Mazy <am@osimis.io>
parents: 763
diff changeset
837
ecf431e1bd44 python sample for ReceivedInstanceCallback
Alain Mazy <am@osimis.io>
parents: 763
diff changeset
838
852
450f0efebe4f FilterIncomingCStoreInstance python sample
Alain Mazy <am@osimis.io>
parents: 839
diff changeset
839 Filtering incoming C-Store instances (new in 4.0)
450f0efebe4f FilterIncomingCStoreInstance python sample
Alain Mazy <am@osimis.io>
parents: 839
diff changeset
840 .................................................
450f0efebe4f FilterIncomingCStoreInstance python sample
Alain Mazy <am@osimis.io>
parents: 839
diff changeset
841
450f0efebe4f FilterIncomingCStoreInstance python sample
Alain Mazy <am@osimis.io>
parents: 839
diff changeset
842 Starting with release 4.0 of the Python plugin, it is possible to
450f0efebe4f FilterIncomingCStoreInstance python sample
Alain Mazy <am@osimis.io>
parents: 839
diff changeset
843 filter instances received from C-Store and return a specific error
450f0efebe4f FilterIncomingCStoreInstance python sample
Alain Mazy <am@osimis.io>
parents: 839
diff changeset
844 code to the sending modality.
450f0efebe4f FilterIncomingCStoreInstance python sample
Alain Mazy <am@osimis.io>
parents: 839
diff changeset
845
450f0efebe4f FilterIncomingCStoreInstance python sample
Alain Mazy <am@osimis.io>
parents: 839
diff changeset
846 This can be used, e.g, to implement a quota per modality or return
450f0efebe4f FilterIncomingCStoreInstance python sample
Alain Mazy <am@osimis.io>
parents: 839
diff changeset
847 an ``out-of-resources`` status if the Orthanc storage is almost full.
450f0efebe4f FilterIncomingCStoreInstance python sample
Alain Mazy <am@osimis.io>
parents: 839
diff changeset
848
450f0efebe4f FilterIncomingCStoreInstance python sample
Alain Mazy <am@osimis.io>
parents: 839
diff changeset
849 .. literalinclude:: python/incoming-cstore-filter.py
450f0efebe4f FilterIncomingCStoreInstance python sample
Alain Mazy <am@osimis.io>
parents: 839
diff changeset
850 :language: python
450f0efebe4f FilterIncomingCStoreInstance python sample
Alain Mazy <am@osimis.io>
parents: 839
diff changeset
851
799
ecf431e1bd44 python sample for ReceivedInstanceCallback
Alain Mazy <am@osimis.io>
parents: 763
diff changeset
852
973
2d817288cad4 added python storage commitment
Alain Mazy <am@osimis.io>
parents: 963
diff changeset
853 Storage Commitment SCP (new in 4.1)
2d817288cad4 added python storage commitment
Alain Mazy <am@osimis.io>
parents: 963
diff changeset
854 ...................................
2d817288cad4 added python storage commitment
Alain Mazy <am@osimis.io>
parents: 963
diff changeset
855
2d817288cad4 added python storage commitment
Alain Mazy <am@osimis.io>
parents: 963
diff changeset
856 Starting with release 4.1 of the Python plugin, it is possible to
2d817288cad4 added python storage commitment
Alain Mazy <am@osimis.io>
parents: 963
diff changeset
857 provide your own implementation of the :ref:`Storage Commitment <storage-commitment>`.
2d817288cad4 added python storage commitment
Alain Mazy <am@osimis.io>
parents: 963
diff changeset
858
2d817288cad4 added python storage commitment
Alain Mazy <am@osimis.io>
parents: 963
diff changeset
859 This can be used, e.g, to check that you have backup the orthanc data in a
2d817288cad4 added python storage commitment
Alain Mazy <am@osimis.io>
parents: 963
diff changeset
860 long term storage.
2d817288cad4 added python storage commitment
Alain Mazy <am@osimis.io>
parents: 963
diff changeset
861
2d817288cad4 added python storage commitment
Alain Mazy <am@osimis.io>
parents: 963
diff changeset
862 .. literalinclude:: python/storage-commitment-default.py
2d817288cad4 added python storage commitment
Alain Mazy <am@osimis.io>
parents: 963
diff changeset
863 :language: python
2d817288cad4 added python storage commitment
Alain Mazy <am@osimis.io>
parents: 963
diff changeset
864
2d817288cad4 added python storage commitment
Alain Mazy <am@osimis.io>
parents: 963
diff changeset
865
975
eb49a4ad8fbc Python plugin: Extending the Orthanc Explorer interface
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 973
diff changeset
866 .. _python_extend_orthanc_explorer:
eb49a4ad8fbc Python plugin: Extending the Orthanc Explorer interface
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 973
diff changeset
867
eb49a4ad8fbc Python plugin: Extending the Orthanc Explorer interface
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 973
diff changeset
868 Extending the Orthanc Explorer interface
eb49a4ad8fbc Python plugin: Extending the Orthanc Explorer interface
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 973
diff changeset
869 ........................................
eb49a4ad8fbc Python plugin: Extending the Orthanc Explorer interface
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 973
diff changeset
870
eb49a4ad8fbc Python plugin: Extending the Orthanc Explorer interface
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 973
diff changeset
871 Here is a sample plugin that adds a new button to Orthanc Explorer
eb49a4ad8fbc Python plugin: Extending the Orthanc Explorer interface
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 973
diff changeset
872 that triggers a Python function:
eb49a4ad8fbc Python plugin: Extending the Orthanc Explorer interface
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 973
diff changeset
873
eb49a4ad8fbc Python plugin: Extending the Orthanc Explorer interface
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 973
diff changeset
874 .. literalinclude:: python/sample-python-button.py
eb49a4ad8fbc Python plugin: Extending the Orthanc Explorer interface
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 973
diff changeset
875 :language: python
eb49a4ad8fbc Python plugin: Extending the Orthanc Explorer interface
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 973
diff changeset
876
eb49a4ad8fbc Python plugin: Extending the Orthanc Explorer interface
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 973
diff changeset
877 As can be seen in this sample:
eb49a4ad8fbc Python plugin: Extending the Orthanc Explorer interface
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 973
diff changeset
878
eb49a4ad8fbc Python plugin: Extending the Orthanc Explorer interface
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 973
diff changeset
879 * The call to ``orthanc.ExtendOrthancExplorer()`` installs the button
eb49a4ad8fbc Python plugin: Extending the Orthanc Explorer interface
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 973
diff changeset
880 with JavaScript code that uses the `jQuery Mobile framework
1021
a3436ae3709c Orthanc 1.12.3
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1018
diff changeset
881 <https://demos.jquerymobile.com/1.1.0/>`__ (as of Orthanc 1.12.3,
975
eb49a4ad8fbc Python plugin: Extending the Orthanc Explorer interface
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 973
diff changeset
882 version 1.1.0 of jQuery Mobile is used in Orthanc Explorer).
eb49a4ad8fbc Python plugin: Extending the Orthanc Explorer interface
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 973
diff changeset
883
eb49a4ad8fbc Python plugin: Extending the Orthanc Explorer interface
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 973
diff changeset
884 * If clicking on the button, a GET call to the REST API is made to
eb49a4ad8fbc Python plugin: Extending the Orthanc Explorer interface
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 973
diff changeset
885 ``../execute-python``. The prefix ``../`` stems from the fact that
eb49a4ad8fbc Python plugin: Extending the Orthanc Explorer interface
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 973
diff changeset
886 Orthanc Explorer is branched inside the ``app/`` folder of the REST
eb49a4ad8fbc Python plugin: Extending the Orthanc Explorer interface
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 973
diff changeset
887 API of Orthanc.
eb49a4ad8fbc Python plugin: Extending the Orthanc Explorer interface
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 973
diff changeset
888
eb49a4ad8fbc Python plugin: Extending the Orthanc Explorer interface
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 973
diff changeset
889 * The GET call to ``../execute-python`` executes the
eb49a4ad8fbc Python plugin: Extending the Orthanc Explorer interface
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 973
diff changeset
890 ``ExecutePython()`` callback function that is written in Python.
eb49a4ad8fbc Python plugin: Extending the Orthanc Explorer interface
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 973
diff changeset
891
eb49a4ad8fbc Python plugin: Extending the Orthanc Explorer interface
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 973
diff changeset
892 Note that it is only possible to extend Orthanc Explorer 1, which is
eb49a4ad8fbc Python plugin: Extending the Orthanc Explorer interface
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 973
diff changeset
893 the built-in Web interface of Orthanc. It is not possible to extend
eb49a4ad8fbc Python plugin: Extending the Orthanc Explorer interface
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 973
diff changeset
894 the :ref:`Orthanc Explorer 2 <orthanc-explorer-2>` interface.
eb49a4ad8fbc Python plugin: Extending the Orthanc Explorer interface
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 973
diff changeset
895
eb49a4ad8fbc Python plugin: Extending the Orthanc Explorer interface
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 973
diff changeset
896
351
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
897 Performance and concurrency
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
898 ---------------------------
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
899
471
a735476a0e6e note about fork on windows
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 462
diff changeset
900 **Important:** This section only applies to UNIX-like systems. The
a735476a0e6e note about fork on windows
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 462
diff changeset
901 ``multiprocessing`` package will not work on Microsoft Windows as the
a735476a0e6e note about fork on windows
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 462
diff changeset
902 latter OS has a different model for `forking processes
a735476a0e6e note about fork on windows
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 462
diff changeset
903 <https://en.wikipedia.org/wiki/Fork_(system_call)>`__.
a735476a0e6e note about fork on windows
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 462
diff changeset
904
555
6fb469a3c382 Python plugin: documentation of orthanc.GenerateRestApiAuthorizationToken()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 554
diff changeset
905 Using slave processes
6fb469a3c382 Python plugin: documentation of orthanc.GenerateRestApiAuthorizationToken()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 554
diff changeset
906 .....................
6fb469a3c382 Python plugin: documentation of orthanc.GenerateRestApiAuthorizationToken()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 554
diff changeset
907
351
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
908 Let us consider the following sample Python script that makes a
702
6e02cd89eb6a moving python samples in separate files
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 701
diff changeset
909 CPU-intensive computation on a REST callback:
351
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
910
702
6e02cd89eb6a moving python samples in separate files
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 701
diff changeset
911 .. literalinclude:: python/multiprocessing-1.py
6e02cd89eb6a moving python samples in separate files
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 701
diff changeset
912 :language: python
351
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
913
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
914 .. highlight:: text
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
915
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
916 Calling this REST route from the command-line returns the time that is
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
917 needed to compute 30 million times a squared root on your CPU::
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
918
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
919 $ curl http://localhost:8042/computation
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
920 computation done in 4.208 seconds
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
921
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
922 Now, let us call this route three times concurrently (we use bash)::
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
923
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
924 $ (curl http://localhost:8042/computation & curl http://localhost:8042/computation & curl http://localhost:8042/computation )
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
925 computation done in 11.262 seconds
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
926 computation done in 12.457 seconds
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
927 computation done in 13.360 seconds
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
928
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
929 As can be seen, the computation time has tripled. This means that the
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
930 computations were not distributed across the available CPU cores.
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
931 This might seem surprising, as Orthanc is a threaded server (in
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
932 Orthanc, a pool of C++ threads serves concurrent requests).
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
933
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
934 The explanation is that the Python interpreter (`CPython
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
935 <https://en.wikipedia.org/wiki/CPython>`__ actually) is built on the
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
936 top of a so-called `Global Interpreter Lock (GIL)
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
937 <https://en.wikipedia.org/wiki/Global_interpreter_lock>`__. The GIL is
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
938 basically a mutex that protects all the calls to the Python
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
939 interpreter. If multiple C++ threads from Orthanc call a Python
353
0122c668f4ec python licensing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 352
diff changeset
940 callback, only one can proceed at any given time. Note however that
0122c668f4ec python licensing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 352
diff changeset
941 the GIL only applies to the Python script: The baseline REST API of
0122c668f4ec python licensing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 352
diff changeset
942 Orthanc is not affected by the GIL.
351
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
943
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
944 The solution is to use the `multiprocessing primitives
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
945 <https://docs.python.org/3/library/multiprocessing.html>`__ of Python.
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
946 The "master" Python interpreter that is initially started by the
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
947 Orthanc plugin, can start several `children processes
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
948 <https://en.wikipedia.org/wiki/Process_(computing)>`__, each of these
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
949 processes running a separate Python interpreter. This allows to
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
950 offload intensive computations from the "master" Python interpreter of
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
951 Orthanc onto those "slave" interpreters. The ``multiprocessing``
702
6e02cd89eb6a moving python samples in separate files
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 701
diff changeset
952 library is actually quite straightforward to use:
351
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
953
702
6e02cd89eb6a moving python samples in separate files
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 701
diff changeset
954 .. literalinclude:: python/multiprocessing-2.py
6e02cd89eb6a moving python samples in separate files
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 701
diff changeset
955 :language: python
351
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
956
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
957 .. highlight:: text
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
958
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
959 Here is now the result of calling this route three times concurrently::
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
960
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
961 $ (curl http://localhost:8042/computation & curl http://localhost:8042/computation & curl http://localhost:8042/computation )
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
962 computation done in 4.211 seconds
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
963 computation done in 4.215 seconds
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
964 computation done in 4.225 seconds
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
965
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
966 As can be seen, the calls to the Python computation now fully run in
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
967 parallel (the time is cut down from 12 seconds to 4 seconds, the same
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
968 as for one isolated request).
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
969
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
970 Note also how the ``multiprocessing`` library allows to make a fine
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
971 control over the computational resources that are available to the
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
972 Python script: The number of "slave" interpreters can be easily
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
973 changed in the constructor of the ``multiprocessing.Pool`` object, and
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
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diff changeset
974 are fully independent of the threads used by the Orthanc server.
e2863083fa30 multiprocessing
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 350
diff changeset
975
555
6fb469a3c382 Python plugin: documentation of orthanc.GenerateRestApiAuthorizationToken()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 554
diff changeset
976 Obviously, an in-depth discussion about the ``multiprocessing``
6fb469a3c382 Python plugin: documentation of orthanc.GenerateRestApiAuthorizationToken()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 554
diff changeset
977 library is out of the scope of this document. There are many
6fb469a3c382 Python plugin: documentation of orthanc.GenerateRestApiAuthorizationToken()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 554
diff changeset
978 references available on Internet. Also, note that ``threading`` is not
6fb469a3c382 Python plugin: documentation of orthanc.GenerateRestApiAuthorizationToken()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 554
diff changeset
979 useful here, as Python multithreading is also limited by the GIL, and
6fb469a3c382 Python plugin: documentation of orthanc.GenerateRestApiAuthorizationToken()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 554
diff changeset
980 is more targeted at dealing with costly I/O operations or with the
6fb469a3c382 Python plugin: documentation of orthanc.GenerateRestApiAuthorizationToken()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 554
diff changeset
981 :ref:`scheduling of commands <python-scheduler>`.
6fb469a3c382 Python plugin: documentation of orthanc.GenerateRestApiAuthorizationToken()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 554
diff changeset
982
6fb469a3c382 Python plugin: documentation of orthanc.GenerateRestApiAuthorizationToken()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 554
diff changeset
983
6fb469a3c382 Python plugin: documentation of orthanc.GenerateRestApiAuthorizationToken()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 554
diff changeset
984 Slave processes and the "orthanc" module
6fb469a3c382 Python plugin: documentation of orthanc.GenerateRestApiAuthorizationToken()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 554
diff changeset
985 ........................................
6fb469a3c382 Python plugin: documentation of orthanc.GenerateRestApiAuthorizationToken()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 554
diff changeset
986
6fb469a3c382 Python plugin: documentation of orthanc.GenerateRestApiAuthorizationToken()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 554
diff changeset
987 Very importantly, pay attention to the fact that **only the "master"
6fb469a3c382 Python plugin: documentation of orthanc.GenerateRestApiAuthorizationToken()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 554
diff changeset
988 Python interpreter has access to the Orthanc SDK**. The "slave"
6fb469a3c382 Python plugin: documentation of orthanc.GenerateRestApiAuthorizationToken()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 554
diff changeset
989 processes have no access to the ``orthanc`` module.
6fb469a3c382 Python plugin: documentation of orthanc.GenerateRestApiAuthorizationToken()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 554
diff changeset
990
6fb469a3c382 Python plugin: documentation of orthanc.GenerateRestApiAuthorizationToken()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 554
diff changeset
991 You must write your Python plugin so as that all the calls to
6fb469a3c382 Python plugin: documentation of orthanc.GenerateRestApiAuthorizationToken()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 554
diff changeset
992 ``orthanc`` are moved from the slaves process to the master
6fb469a3c382 Python plugin: documentation of orthanc.GenerateRestApiAuthorizationToken()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 554
diff changeset
993 process. For instance, here is how you would parse a DICOM file in a
702
6e02cd89eb6a moving python samples in separate files
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 701
diff changeset
994 slave process:
352
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 351
diff changeset
995
702
6e02cd89eb6a moving python samples in separate files
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 701
diff changeset
996 .. literalinclude:: python/multiprocessing-3.py
6e02cd89eb6a moving python samples in separate files
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 701
diff changeset
997 :language: python
352
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 351
diff changeset
998
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 351
diff changeset
999 Communication primitives such as ``multiprocessing.Queue`` are
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 351
diff changeset
1000 available to exchange messages from the "slave" Python interpreters to
555
6fb469a3c382 Python plugin: documentation of orthanc.GenerateRestApiAuthorizationToken()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 554
diff changeset
1001 the "master" Python interpreter for more advanced scenarios.
6fb469a3c382 Python plugin: documentation of orthanc.GenerateRestApiAuthorizationToken()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 554
diff changeset
1002
6fb469a3c382 Python plugin: documentation of orthanc.GenerateRestApiAuthorizationToken()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 554
diff changeset
1003 NB: Starting with release 3.0 of the Python plugin, it is possible to
6fb469a3c382 Python plugin: documentation of orthanc.GenerateRestApiAuthorizationToken()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 554
diff changeset
1004 call the REST API of Orthanc from a slave process in a more direct
6fb469a3c382 Python plugin: documentation of orthanc.GenerateRestApiAuthorizationToken()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 554
diff changeset
1005 way. The function ``orthanc.GenerateRestApiAuthorizationToken()`` can
6fb469a3c382 Python plugin: documentation of orthanc.GenerateRestApiAuthorizationToken()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 554
diff changeset
1006 be used to create an authorization token that provides full access to
6fb469a3c382 Python plugin: documentation of orthanc.GenerateRestApiAuthorizationToken()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 554
diff changeset
1007 the REST API of Orthanc (without have to set credentials in your
6fb469a3c382 Python plugin: documentation of orthanc.GenerateRestApiAuthorizationToken()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 554
diff changeset
1008 plugin). Any HTTP client library for Python, such as `requests
6fb469a3c382 Python plugin: documentation of orthanc.GenerateRestApiAuthorizationToken()
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 554
diff changeset
1009 <https://requests.readthedocs.io/en/master/>`__, can then be used to
702
6e02cd89eb6a moving python samples in separate files
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 701
diff changeset
1010 access the REST API of Orthanc. Here is a minimal example:
352
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 351
diff changeset
1011
702
6e02cd89eb6a moving python samples in separate files
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parents: 701
diff changeset
1012 .. literalinclude:: python/multiprocessing-4.py
6e02cd89eb6a moving python samples in separate files
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 701
diff changeset
1013 :language: python
1018
868552e0caf8 python venv
Alain Mazy <am@osimis.io>
parents: 1013
diff changeset
1014
868552e0caf8 python venv
Alain Mazy <am@osimis.io>
parents: 1013
diff changeset
1015 Working with virtual environments
868552e0caf8 python venv
Alain Mazy <am@osimis.io>
parents: 1013
diff changeset
1016 ---------------------------------
868552e0caf8 python venv
Alain Mazy <am@osimis.io>
parents: 1013
diff changeset
1017
868552e0caf8 python venv
Alain Mazy <am@osimis.io>
parents: 1013
diff changeset
1018 By default, Orthanc uses the system-wide Python installation and
868552e0caf8 python venv
Alain Mazy <am@osimis.io>
parents: 1013
diff changeset
1019 therefore has access to the python modules that have been installed
868552e0caf8 python venv
Alain Mazy <am@osimis.io>
parents: 1013
diff changeset
1020 system-wide.
868552e0caf8 python venv
Alain Mazy <am@osimis.io>
parents: 1013
diff changeset
1021
868552e0caf8 python venv
Alain Mazy <am@osimis.io>
parents: 1013
diff changeset
1022 As of version 4.1 of the python plugin, there is no built-in support
868552e0caf8 python venv
Alain Mazy <am@osimis.io>
parents: 1013
diff changeset
1023 for working with a `virtual environment <https://docs.python.org/3/library/venv.html>`__.
868552e0caf8 python venv
Alain Mazy <am@osimis.io>
parents: 1013
diff changeset
1024 However, you may modify the python path at the very beginning of the script
868552e0caf8 python venv
Alain Mazy <am@osimis.io>
parents: 1013
diff changeset
1025 to instruct python to look for modules in your environment.
868552e0caf8 python venv
Alain Mazy <am@osimis.io>
parents: 1013
diff changeset
1026
868552e0caf8 python venv
Alain Mazy <am@osimis.io>
parents: 1013
diff changeset
1027 **Example 1**: On a Linux system, consider that you have created a virtual environment in ``/tmp/.venv``
868552e0caf8 python venv
Alain Mazy <am@osimis.io>
parents: 1013
diff changeset
1028 and you want to use only the modules that have been installed in this virtual environment.
868552e0caf8 python venv
Alain Mazy <am@osimis.io>
parents: 1013
diff changeset
1029 In this case, you may simply rewrite ``sys.path``:
868552e0caf8 python venv
Alain Mazy <am@osimis.io>
parents: 1013
diff changeset
1030
868552e0caf8 python venv
Alain Mazy <am@osimis.io>
parents: 1013
diff changeset
1031 .. literalinclude:: python/venv-linux.py
868552e0caf8 python venv
Alain Mazy <am@osimis.io>
parents: 1013
diff changeset
1032 :language: python
868552e0caf8 python venv
Alain Mazy <am@osimis.io>
parents: 1013
diff changeset
1033
868552e0caf8 python venv
Alain Mazy <am@osimis.io>
parents: 1013
diff changeset
1034
868552e0caf8 python venv
Alain Mazy <am@osimis.io>
parents: 1013
diff changeset
1035 **Example 2**: On a Windows system, consider that you have created a virtual environment in ``C:/tmp/.venv/``.
868552e0caf8 python venv
Alain Mazy <am@osimis.io>
parents: 1013
diff changeset
1036 Instead of defining ``sys.path`` from scratch, it is possible to simply insert the venv-packages in
868552e0caf8 python venv
Alain Mazy <am@osimis.io>
parents: 1013
diff changeset
1037 the ``sys.path``. By adding the ``venv`` to an early index (``0``), any package required by your code
868552e0caf8 python venv
Alain Mazy <am@osimis.io>
parents: 1013
diff changeset
1038 will be looked up in the ``venv`` first. And, as a consequence, if the package is not present, the system-wide
868552e0caf8 python venv
Alain Mazy <am@osimis.io>
parents: 1013
diff changeset
1039 installation of that package might be loaded:
868552e0caf8 python venv
Alain Mazy <am@osimis.io>
parents: 1013
diff changeset
1040
868552e0caf8 python venv
Alain Mazy <am@osimis.io>
parents: 1013
diff changeset
1041 .. literalinclude:: python/venv-windows.py
868552e0caf8 python venv
Alain Mazy <am@osimis.io>
parents: 1013
diff changeset
1042 :language: python