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<!DOCTYPE html>
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<title>arrayfire.opencl — ArrayFire Python documentation</title>
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<h1>Source code for arrayfire.opencl</h1><div class="highlight"><pre>
<span></span><span class="c1">#######################################################</span>
<span class="c1"># Copyright (c) 2015, ArrayFire</span>
<span class="c1"># All rights reserved.</span>
<span class="c1">#</span>
<span class="c1"># This file is distributed under 3-clause BSD license.</span>
<span class="c1"># The complete license agreement can be obtained at:</span>
<span class="c1"># http://arrayfire.com/licenses/BSD-3-Clause</span>
<span class="c1">########################################################</span>
<span class="sd">"""</span>
<span class="sd">Functions specific to OpenCL backend.</span>
<span class="sd">This module provides interoperability with other OpenCL libraries.</span>
<span class="sd">"""</span>
<span class="kn">from</span> <span class="nn">.util</span> <span class="kn">import</span> <span class="o">*</span>
<span class="kn">from</span> <span class="nn">.library</span> <span class="kn">import</span> <span class="p">(</span><span class="n">_Enum</span><span class="p">,</span> <span class="n">_Enum_Type</span><span class="p">)</span>
<div class="viewcode-block" id="DEVICE_TYPE"><a class="viewcode-back" href="../../arrayfire.opencl.html#arrayfire.opencl.DEVICE_TYPE">[docs]</a><span class="k">class</span> <span class="nc">DEVICE_TYPE</span><span class="p">(</span><span class="n">_Enum</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> ArrayFire wrapper for CL_DEVICE_TYPE</span>
<span class="sd"> """</span>
<span class="n">CPU</span> <span class="o">=</span> <span class="n">_Enum_Type</span><span class="p">(</span><span class="mi">1</span><span class="o"><<</span><span class="mi">1</span><span class="p">)</span>
<span class="n">GPU</span> <span class="o">=</span> <span class="n">_Enum_Type</span><span class="p">(</span><span class="mi">1</span><span class="o"><<</span><span class="mi">2</span><span class="p">)</span>
<span class="n">ACC</span> <span class="o">=</span> <span class="n">_Enum_Type</span><span class="p">(</span><span class="mi">1</span><span class="o"><<</span><span class="mi">3</span><span class="p">)</span>
<span class="n">UNKNOWN</span> <span class="o">=</span> <span class="n">_Enum_Type</span><span class="p">(</span><span class="o">-</span><span class="mi">1</span><span class="p">)</span></div>
<div class="viewcode-block" id="PLATFORM"><a class="viewcode-back" href="../../arrayfire.opencl.html#arrayfire.opencl.PLATFORM">[docs]</a><span class="k">class</span> <span class="nc">PLATFORM</span><span class="p">(</span><span class="n">_Enum</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> ArrayFire enum for common platforms</span>
<span class="sd"> """</span>
<span class="n">AMD</span> <span class="o">=</span> <span class="n">_Enum_Type</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span>
<span class="n">APPLE</span> <span class="o">=</span> <span class="n">_Enum_Type</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span>
<span class="n">INTEL</span> <span class="o">=</span> <span class="n">_Enum_Type</span><span class="p">(</span><span class="mi">2</span><span class="p">)</span>
<span class="n">NVIDIA</span> <span class="o">=</span> <span class="n">_Enum_Type</span><span class="p">(</span><span class="mi">3</span><span class="p">)</span>
<span class="n">BEIGNET</span> <span class="o">=</span> <span class="n">_Enum_Type</span><span class="p">(</span><span class="mi">4</span><span class="p">)</span>
<span class="n">POCL</span> <span class="o">=</span> <span class="n">_Enum_Type</span><span class="p">(</span><span class="mi">5</span><span class="p">)</span>
<span class="n">UNKNOWN</span> <span class="o">=</span> <span class="n">_Enum_Type</span><span class="p">(</span><span class="o">-</span><span class="mi">1</span><span class="p">)</span></div>
<div class="viewcode-block" id="get_context"><a class="viewcode-back" href="../../arrayfire.opencl.html#arrayfire.opencl.get_context">[docs]</a><span class="k">def</span> <span class="nf">get_context</span><span class="p">(</span><span class="n">retain</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Get the current OpenCL context being used by ArrayFire.</span>
<span class="sd"> Parameters</span>
<span class="sd"> ----------</span>
<span class="sd"> retain : bool. optional. Default: False.</span>
<span class="sd"> Specifies if the context needs to be retained by arrayfire before returning.</span>
<span class="sd"> Returns</span>
<span class="sd"> -----------</span>
<span class="sd"> context : integer denoting the context id.</span>
<span class="sd"> """</span>
<span class="kn">import</span> <span class="nn">ctypes</span> <span class="k">as</span> <span class="nn">ct</span>
<span class="kn">from</span> <span class="nn">.util</span> <span class="kn">import</span> <span class="n">safe_call</span> <span class="k">as</span> <span class="n">safe_call</span>
<span class="kn">from</span> <span class="nn">.library</span> <span class="kn">import</span> <span class="n">backend</span>
<span class="k">if</span> <span class="p">(</span><span class="n">backend</span><span class="o">.</span><span class="n">name</span><span class="p">()</span> <span class="o">!=</span> <span class="s2">"opencl"</span><span class="p">):</span>
<span class="k">raise</span> <span class="ne">RuntimeError</span><span class="p">(</span><span class="s2">"Invalid backend loaded"</span><span class="p">)</span>
<span class="n">context</span> <span class="o">=</span> <span class="n">c_void_ptr_t</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span>
<span class="n">safe_call</span><span class="p">(</span><span class="n">backend</span><span class="o">.</span><span class="n">get</span><span class="p">()</span><span class="o">.</span><span class="n">afcl_get_context</span><span class="p">(</span><span class="n">c_pointer</span><span class="p">(</span><span class="n">context</span><span class="p">),</span> <span class="n">retain</span><span class="p">))</span>
<span class="k">return</span> <span class="n">context</span><span class="o">.</span><span class="n">value</span></div>
<div class="viewcode-block" id="get_queue"><a class="viewcode-back" href="../../arrayfire.opencl.html#arrayfire.opencl.get_queue">[docs]</a><span class="k">def</span> <span class="nf">get_queue</span><span class="p">(</span><span class="n">retain</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Get the current OpenCL command queue being used by ArrayFire.</span>
<span class="sd"> Parameters</span>
<span class="sd"> ----------</span>
<span class="sd"> retain : bool. optional. Default: False.</span>
<span class="sd"> Specifies if the context needs to be retained by arrayfire before returning.</span>
<span class="sd"> Returns</span>
<span class="sd"> -----------</span>
<span class="sd"> queue : integer denoting the queue id.</span>
<span class="sd"> """</span>
<span class="kn">import</span> <span class="nn">ctypes</span> <span class="k">as</span> <span class="nn">ct</span>
<span class="kn">from</span> <span class="nn">.util</span> <span class="kn">import</span> <span class="n">safe_call</span> <span class="k">as</span> <span class="n">safe_call</span>
<span class="kn">from</span> <span class="nn">.library</span> <span class="kn">import</span> <span class="n">backend</span>
<span class="k">if</span> <span class="p">(</span><span class="n">backend</span><span class="o">.</span><span class="n">name</span><span class="p">()</span> <span class="o">!=</span> <span class="s2">"opencl"</span><span class="p">):</span>
<span class="k">raise</span> <span class="ne">RuntimeError</span><span class="p">(</span><span class="s2">"Invalid backend loaded"</span><span class="p">)</span>
<span class="n">queue</span> <span class="o">=</span> <span class="n">c_int_t</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span>
<span class="n">safe_call</span><span class="p">(</span><span class="n">backend</span><span class="o">.</span><span class="n">get</span><span class="p">()</span><span class="o">.</span><span class="n">afcl_get_queue</span><span class="p">(</span><span class="n">c_pointer</span><span class="p">(</span><span class="n">queue</span><span class="p">),</span> <span class="n">retain</span><span class="p">))</span>
<span class="k">return</span> <span class="n">queue</span><span class="o">.</span><span class="n">value</span></div>
<div class="viewcode-block" id="get_device_id"><a class="viewcode-back" href="../../arrayfire.opencl.html#arrayfire.opencl.get_device_id">[docs]</a><span class="k">def</span> <span class="nf">get_device_id</span><span class="p">():</span>
<span class="sd">"""</span>
<span class="sd"> Get native (unsorted) OpenCL device ID</span>
<span class="sd"> Returns</span>
<span class="sd"> --------</span>
<span class="sd"> idx : int.</span>
<span class="sd"> Specifies the `cl_device_id` of the device.</span>
<span class="sd"> """</span>
<span class="kn">import</span> <span class="nn">ctypes</span> <span class="k">as</span> <span class="nn">ct</span>
<span class="kn">from</span> <span class="nn">.util</span> <span class="kn">import</span> <span class="n">safe_call</span> <span class="k">as</span> <span class="n">safe_call</span>
<span class="kn">from</span> <span class="nn">.library</span> <span class="kn">import</span> <span class="n">backend</span>
<span class="k">if</span> <span class="p">(</span><span class="n">backend</span><span class="o">.</span><span class="n">name</span><span class="p">()</span> <span class="o">!=</span> <span class="s2">"opencl"</span><span class="p">):</span>
<span class="k">raise</span> <span class="ne">RuntimeError</span><span class="p">(</span><span class="s2">"Invalid backend loaded"</span><span class="p">)</span>
<span class="n">idx</span> <span class="o">=</span> <span class="n">c_int_t</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span>
<span class="n">safe_call</span><span class="p">(</span><span class="n">backend</span><span class="o">.</span><span class="n">get</span><span class="p">()</span><span class="o">.</span><span class="n">afcl_get_device_id</span><span class="p">(</span><span class="n">c_pointer</span><span class="p">(</span><span class="n">idx</span><span class="p">)))</span>
<span class="k">return</span> <span class="n">idx</span><span class="o">.</span><span class="n">value</span></div>
<div class="viewcode-block" id="set_device_id"><a class="viewcode-back" href="../../arrayfire.opencl.html#arrayfire.opencl.set_device_id">[docs]</a><span class="k">def</span> <span class="nf">set_device_id</span><span class="p">(</span><span class="n">idx</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Set native (unsorted) OpenCL device ID</span>
<span class="sd"> Parameters</span>
<span class="sd"> ----------</span>
<span class="sd"> idx : int.</span>
<span class="sd"> Specifies the `cl_device_id` of the device.</span>
<span class="sd"> """</span>
<span class="kn">import</span> <span class="nn">ctypes</span> <span class="k">as</span> <span class="nn">ct</span>
<span class="kn">from</span> <span class="nn">.util</span> <span class="kn">import</span> <span class="n">safe_call</span> <span class="k">as</span> <span class="n">safe_call</span>
<span class="kn">from</span> <span class="nn">.library</span> <span class="kn">import</span> <span class="n">backend</span>
<span class="k">if</span> <span class="p">(</span><span class="n">backend</span><span class="o">.</span><span class="n">name</span><span class="p">()</span> <span class="o">!=</span> <span class="s2">"opencl"</span><span class="p">):</span>
<span class="k">raise</span> <span class="ne">RuntimeError</span><span class="p">(</span><span class="s2">"Invalid backend loaded"</span><span class="p">)</span>
<span class="n">safe_call</span><span class="p">(</span><span class="n">backend</span><span class="o">.</span><span class="n">get</span><span class="p">()</span><span class="o">.</span><span class="n">afcl_set_device_id</span><span class="p">(</span><span class="n">idx</span><span class="p">))</span>
<span class="k">return</span></div>
<div class="viewcode-block" id="add_device_context"><a class="viewcode-back" href="../../arrayfire.opencl.html#arrayfire.opencl.add_device_context">[docs]</a><span class="k">def</span> <span class="nf">add_device_context</span><span class="p">(</span><span class="n">dev</span><span class="p">,</span> <span class="n">ctx</span><span class="p">,</span> <span class="n">que</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Add a new device to arrayfire opencl device manager</span>
<span class="sd"> Parameters</span>
<span class="sd"> ----------</span>
<span class="sd"> dev : cl_device_id</span>
<span class="sd"> ctx : cl_context</span>
<span class="sd"> que : cl_command_queue</span>
<span class="sd"> """</span>
<span class="kn">import</span> <span class="nn">ctypes</span> <span class="k">as</span> <span class="nn">ct</span>
<span class="kn">from</span> <span class="nn">.util</span> <span class="kn">import</span> <span class="n">safe_call</span> <span class="k">as</span> <span class="n">safe_call</span>
<span class="kn">from</span> <span class="nn">.library</span> <span class="kn">import</span> <span class="n">backend</span>
<span class="k">if</span> <span class="p">(</span><span class="n">backend</span><span class="o">.</span><span class="n">name</span><span class="p">()</span> <span class="o">!=</span> <span class="s2">"opencl"</span><span class="p">):</span>
<span class="k">raise</span> <span class="ne">RuntimeError</span><span class="p">(</span><span class="s2">"Invalid backend loaded"</span><span class="p">)</span>
<span class="n">safe_call</span><span class="p">(</span><span class="n">backend</span><span class="o">.</span><span class="n">get</span><span class="p">()</span><span class="o">.</span><span class="n">afcl_add_device_context</span><span class="p">(</span><span class="n">dev</span><span class="p">,</span> <span class="n">ctx</span><span class="p">,</span> <span class="n">que</span><span class="p">))</span></div>
<div class="viewcode-block" id="set_device_context"><a class="viewcode-back" href="../../arrayfire.opencl.html#arrayfire.opencl.set_device_context">[docs]</a><span class="k">def</span> <span class="nf">set_device_context</span><span class="p">(</span><span class="n">dev</span><span class="p">,</span> <span class="n">ctx</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Set a device as current active device</span>
<span class="sd"> Parameters</span>
<span class="sd"> ----------</span>
<span class="sd"> dev : cl_device_id</span>
<span class="sd"> ctx : cl_context</span>
<span class="sd"> """</span>
<span class="kn">import</span> <span class="nn">ctypes</span> <span class="k">as</span> <span class="nn">ct</span>
<span class="kn">from</span> <span class="nn">.util</span> <span class="kn">import</span> <span class="n">safe_call</span> <span class="k">as</span> <span class="n">safe_call</span>
<span class="kn">from</span> <span class="nn">.library</span> <span class="kn">import</span> <span class="n">backend</span>
<span class="k">if</span> <span class="p">(</span><span class="n">backend</span><span class="o">.</span><span class="n">name</span><span class="p">()</span> <span class="o">!=</span> <span class="s2">"opencl"</span><span class="p">):</span>
<span class="k">raise</span> <span class="ne">RuntimeError</span><span class="p">(</span><span class="s2">"Invalid backend loaded"</span><span class="p">)</span>
<span class="n">safe_call</span><span class="p">(</span><span class="n">backend</span><span class="o">.</span><span class="n">get</span><span class="p">()</span><span class="o">.</span><span class="n">afcl_set_device_context</span><span class="p">(</span><span class="n">dev</span><span class="p">,</span> <span class="n">ctx</span><span class="p">))</span></div>
<div class="viewcode-block" id="delete_device_context"><a class="viewcode-back" href="../../arrayfire.opencl.html#arrayfire.opencl.delete_device_context">[docs]</a><span class="k">def</span> <span class="nf">delete_device_context</span><span class="p">(</span><span class="n">dev</span><span class="p">,</span> <span class="n">ctx</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Delete a device</span>
<span class="sd"> Parameters</span>
<span class="sd"> ----------</span>
<span class="sd"> dev : cl_device_id</span>
<span class="sd"> ctx : cl_context</span>
<span class="sd"> """</span>
<span class="kn">import</span> <span class="nn">ctypes</span> <span class="k">as</span> <span class="nn">ct</span>
<span class="kn">from</span> <span class="nn">.util</span> <span class="kn">import</span> <span class="n">safe_call</span> <span class="k">as</span> <span class="n">safe_call</span>
<span class="kn">from</span> <span class="nn">.library</span> <span class="kn">import</span> <span class="n">backend</span>
<span class="k">if</span> <span class="p">(</span><span class="n">backend</span><span class="o">.</span><span class="n">name</span><span class="p">()</span> <span class="o">!=</span> <span class="s2">"opencl"</span><span class="p">):</span>
<span class="k">raise</span> <span class="ne">RuntimeError</span><span class="p">(</span><span class="s2">"Invalid backend loaded"</span><span class="p">)</span>
<span class="n">safe_call</span><span class="p">(</span><span class="n">backend</span><span class="o">.</span><span class="n">get</span><span class="p">()</span><span class="o">.</span><span class="n">afcl_delete_device_context</span><span class="p">(</span><span class="n">dev</span><span class="p">,</span> <span class="n">ctx</span><span class="p">))</span></div>
<span class="n">_to_device_type</span> <span class="o">=</span> <span class="p">{</span><span class="n">DEVICE_TYPE</span><span class="o">.</span><span class="n">CPU</span><span class="o">.</span><span class="n">value</span> <span class="p">:</span> <span class="n">DEVICE_TYPE</span><span class="o">.</span><span class="n">CPU</span><span class="p">,</span>
<span class="n">DEVICE_TYPE</span><span class="o">.</span><span class="n">GPU</span><span class="o">.</span><span class="n">value</span> <span class="p">:</span> <span class="n">DEVICE_TYPE</span><span class="o">.</span><span class="n">GPU</span><span class="p">,</span>
<span class="n">DEVICE_TYPE</span><span class="o">.</span><span class="n">ACC</span><span class="o">.</span><span class="n">value</span> <span class="p">:</span> <span class="n">DEVICE_TYPE</span><span class="o">.</span><span class="n">ACC</span><span class="p">,</span>
<span class="n">DEVICE_TYPE</span><span class="o">.</span><span class="n">UNKNOWN</span><span class="o">.</span><span class="n">value</span> <span class="p">:</span> <span class="n">DEVICE_TYPE</span><span class="o">.</span><span class="n">UNKNOWN</span><span class="p">}</span>
<span class="n">_to_platform</span> <span class="o">=</span> <span class="p">{</span><span class="n">PLATFORM</span><span class="o">.</span><span class="n">AMD</span><span class="o">.</span><span class="n">value</span> <span class="p">:</span> <span class="n">PLATFORM</span><span class="o">.</span><span class="n">AMD</span><span class="p">,</span>
<span class="n">PLATFORM</span><span class="o">.</span><span class="n">APPLE</span><span class="o">.</span><span class="n">value</span> <span class="p">:</span> <span class="n">PLATFORM</span><span class="o">.</span><span class="n">APPLE</span><span class="p">,</span>
<span class="n">PLATFORM</span><span class="o">.</span><span class="n">INTEL</span><span class="o">.</span><span class="n">value</span> <span class="p">:</span> <span class="n">PLATFORM</span><span class="o">.</span><span class="n">INTEL</span><span class="p">,</span>
<span class="n">PLATFORM</span><span class="o">.</span><span class="n">NVIDIA</span><span class="o">.</span><span class="n">value</span> <span class="p">:</span> <span class="n">PLATFORM</span><span class="o">.</span><span class="n">NVIDIA</span><span class="p">,</span>
<span class="n">PLATFORM</span><span class="o">.</span><span class="n">BEIGNET</span><span class="o">.</span><span class="n">value</span> <span class="p">:</span> <span class="n">PLATFORM</span><span class="o">.</span><span class="n">BEIGNET</span><span class="p">,</span>
<span class="n">PLATFORM</span><span class="o">.</span><span class="n">POCL</span><span class="o">.</span><span class="n">value</span> <span class="p">:</span> <span class="n">PLATFORM</span><span class="o">.</span><span class="n">POCL</span><span class="p">,</span>
<span class="n">PLATFORM</span><span class="o">.</span><span class="n">UNKNOWN</span><span class="o">.</span><span class="n">value</span> <span class="p">:</span> <span class="n">PLATFORM</span><span class="o">.</span><span class="n">UNKNOWN</span><span class="p">}</span>
<div class="viewcode-block" id="get_device_type"><a class="viewcode-back" href="../../arrayfire.opencl.html#arrayfire.opencl.get_device_type">[docs]</a><span class="k">def</span> <span class="nf">get_device_type</span><span class="p">():</span>
<span class="sd">"""</span>
<span class="sd"> Get opencl device type</span>
<span class="sd"> """</span>
<span class="kn">import</span> <span class="nn">ctypes</span> <span class="k">as</span> <span class="nn">ct</span>
<span class="kn">from</span> <span class="nn">.util</span> <span class="kn">import</span> <span class="n">safe_call</span> <span class="k">as</span> <span class="n">safe_call</span>
<span class="kn">from</span> <span class="nn">.library</span> <span class="kn">import</span> <span class="n">backend</span>
<span class="k">if</span> <span class="p">(</span><span class="n">backend</span><span class="o">.</span><span class="n">name</span><span class="p">()</span> <span class="o">!=</span> <span class="s2">"opencl"</span><span class="p">):</span>
<span class="k">raise</span> <span class="ne">RuntimeError</span><span class="p">(</span><span class="s2">"Invalid backend loaded"</span><span class="p">)</span>
<span class="n">res</span> <span class="o">=</span> <span class="n">c_int_t</span><span class="p">(</span><span class="n">DEVICE_TYPE</span><span class="o">.</span><span class="n">UNKNOWN</span><span class="o">.</span><span class="n">value</span><span class="p">)</span>
<span class="n">safe_call</span><span class="p">(</span><span class="n">backend</span><span class="o">.</span><span class="n">get</span><span class="p">()</span><span class="o">.</span><span class="n">afcl_get_device_type</span><span class="p">(</span><span class="n">c_pointer</span><span class="p">(</span><span class="n">res</span><span class="p">)))</span>
<span class="k">return</span> <span class="n">_to_device_type</span><span class="p">[</span><span class="n">res</span><span class="o">.</span><span class="n">value</span><span class="p">]</span></div>
<div class="viewcode-block" id="get_platform"><a class="viewcode-back" href="../../arrayfire.opencl.html#arrayfire.opencl.get_platform">[docs]</a><span class="k">def</span> <span class="nf">get_platform</span><span class="p">():</span>
<span class="sd">"""</span>
<span class="sd"> Get opencl platform</span>
<span class="sd"> """</span>
<span class="kn">import</span> <span class="nn">ctypes</span> <span class="k">as</span> <span class="nn">ct</span>
<span class="kn">from</span> <span class="nn">.util</span> <span class="kn">import</span> <span class="n">safe_call</span> <span class="k">as</span> <span class="n">safe_call</span>
<span class="kn">from</span> <span class="nn">.library</span> <span class="kn">import</span> <span class="n">backend</span>
<span class="k">if</span> <span class="p">(</span><span class="n">backend</span><span class="o">.</span><span class="n">name</span><span class="p">()</span> <span class="o">!=</span> <span class="s2">"opencl"</span><span class="p">):</span>
<span class="k">raise</span> <span class="ne">RuntimeError</span><span class="p">(</span><span class="s2">"Invalid backend loaded"</span><span class="p">)</span>
<span class="n">res</span> <span class="o">=</span> <span class="n">c_int_t</span><span class="p">(</span><span class="n">PLATFORM</span><span class="o">.</span><span class="n">UNKNOWN</span><span class="o">.</span><span class="n">value</span><span class="p">)</span>
<span class="n">safe_call</span><span class="p">(</span><span class="n">backend</span><span class="o">.</span><span class="n">get</span><span class="p">()</span><span class="o">.</span><span class="n">afcl_get_platform</span><span class="p">(</span><span class="n">c_pointer</span><span class="p">(</span><span class="n">res</span><span class="p">)))</span>
<span class="k">return</span> <span class="n">_to_platform</span><span class="p">[</span><span class="n">res</span><span class="o">.</span><span class="n">value</span><span class="p">]</span></div>
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