<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" lang=""> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>django.template.context — Django 1.8.19 documentation</title> <link rel="stylesheet" href="../../../_static/default.css" type="text/css" /> <link rel="stylesheet" href="../../../_static/pygments.css" type="text/css" /> <script type="text/javascript"> var DOCUMENTATION_OPTIONS = { URL_ROOT: '../../../', VERSION: '1.8.19', COLLAPSE_INDEX: false, FILE_SUFFIX: '.html', HAS_SOURCE: true }; </script> <script type="text/javascript" src="../../../_static/jquery.js"></script> <script type="text/javascript" src="../../../_static/underscore.js"></script> <script type="text/javascript" src="../../../_static/doctools.js"></script> <link rel="index" title="Index" href="../../../genindex.html" /> <link rel="search" title="Search" 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code for django.template.context</h1><div class="highlight"><pre> <span></span><span class="kn">import</span> <span class="nn">warnings</span> <span class="kn">from</span> <span class="nn">contextlib</span> <span class="k">import</span> <span class="n">contextmanager</span> <span class="kn">from</span> <span class="nn">copy</span> <span class="k">import</span> <span class="n">copy</span> <span class="kn">from</span> <span class="nn">django.utils.deprecation</span> <span class="k">import</span> <span class="n">RemovedInDjango110Warning</span> <span class="c1"># Hard-coded processor for easier use of CSRF protection.</span> <span class="n">_builtin_context_processors</span> <span class="o">=</span> <span class="p">(</span><span class="s1">'django.template.context_processors.csrf'</span><span class="p">,)</span> <span class="n">_current_app_undefined</span> <span class="o">=</span> <span class="nb">object</span><span class="p">()</span> <div class="viewcode-block" id="ContextPopException"><a class="viewcode-back" href="../../../ref/templates/api.html#django.template.ContextPopException">[docs]</a><span class="k">class</span> <span class="nc">ContextPopException</span><span class="p">(</span><span class="ne">Exception</span><span class="p">):</span> <span class="s2">"pop() has been called more times than push()"</span> <span class="k">pass</span></div> <span class="k">class</span> <span class="nc">ContextDict</span><span class="p">(</span><span class="nb">dict</span><span class="p">):</span> <span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">context</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span> <span class="nb">super</span><span class="p">(</span><span class="n">ContextDict</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">__init__</span><span class="p">(</span><span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span> <span class="n">context</span><span class="o">.</span><span class="n">dicts</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="bp">self</span><span class="o">.</span><span class="n">context</span> <span class="o">=</span> <span class="n">context</span> <span class="k">def</span> <span class="nf">__enter__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> <span class="k">return</span> <span class="bp">self</span> <span class="k">def</span> <span class="nf">__exit__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span> <span class="bp">self</span><span class="o">.</span><span class="n">context</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span> <span class="k">class</span> <span class="nc">BaseContext</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span> <span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">dict_</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span> <span class="bp">self</span><span class="o">.</span><span class="n">_reset_dicts</span><span class="p">(</span><span class="n">dict_</span><span class="p">)</span> <span class="k">def</span> <span class="nf">_reset_dicts</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">value</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span> <span class="n">builtins</span> <span class="o">=</span> <span class="p">{</span><span class="s1">'True'</span><span class="p">:</span> <span class="kc">True</span><span class="p">,</span> <span class="s1">'False'</span><span class="p">:</span> <span class="kc">False</span><span class="p">,</span> <span class="s1">'None'</span><span class="p">:</span> <span class="kc">None</span><span class="p">}</span> <span class="bp">self</span><span class="o">.</span><span class="n">dicts</span> <span class="o">=</span> <span class="p">[</span><span class="n">builtins</span><span class="p">]</span> <span class="k">if</span> <span class="n">value</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">dicts</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">value</span><span class="p">)</span> <span class="k">def</span> <span class="nf">__copy__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> <span class="n">duplicate</span> <span class="o">=</span> <span class="n">copy</span><span class="p">(</span><span class="nb">super</span><span class="p">(</span><span class="n">BaseContext</span><span class="p">,</span> <span class="bp">self</span><span class="p">))</span> <span class="n">duplicate</span><span class="o">.</span><span class="n">dicts</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">dicts</span><span class="p">[:]</span> <span class="k">return</span> <span class="n">duplicate</span> <span class="k">def</span> <span class="nf">__repr__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> <span class="k">return</span> <span class="nb">repr</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">dicts</span><span class="p">)</span> <span class="k">def</span> <span class="nf">__iter__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> <span class="k">for</span> <span class="n">d</span> <span class="ow">in</span> <span class="nb">reversed</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">dicts</span><span class="p">):</span> <span class="k">yield</span> <span class="n">d</span> <span class="k">def</span> <span class="nf">push</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span> <span class="k">return</span> <span class="n">ContextDict</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span> <span class="k">def</span> <span class="nf">pop</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">dicts</span><span class="p">)</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span> <span class="k">raise</span> <span class="n">ContextPopException</span> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">dicts</span><span class="o">.</span><span class="n">pop</span><span class="p">()</span> <span class="k">def</span> <span class="nf">__setitem__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">key</span><span class="p">,</span> <span class="n">value</span><span class="p">):</span> <span class="s2">"Set a variable in the current context"</span> <span class="bp">self</span><span class="o">.</span><span class="n">dicts</span><span class="p">[</span><span class="o">-</span><span class="mi">1</span><span class="p">][</span><span class="n">key</span><span class="p">]</span> <span class="o">=</span> <span class="n">value</span> <span class="k">def</span> <span class="nf">__getitem__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">key</span><span class="p">):</span> <span class="s2">"Get a variable's value, starting at the current context and going upward"</span> <span class="k">for</span> <span class="n">d</span> <span class="ow">in</span> <span class="nb">reversed</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">dicts</span><span class="p">):</span> <span class="k">if</span> <span class="n">key</span> <span class="ow">in</span> <span class="n">d</span><span class="p">:</span> <span class="k">return</span> <span class="n">d</span><span class="p">[</span><span class="n">key</span><span class="p">]</span> <span class="k">raise</span> <span class="ne">KeyError</span><span class="p">(</span><span class="n">key</span><span class="p">)</span> <span class="k">def</span> <span class="nf">__delitem__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">key</span><span class="p">):</span> <span class="s2">"Delete a variable from the current context"</span> <span class="k">del</span> <span class="bp">self</span><span class="o">.</span><span class="n">dicts</span><span class="p">[</span><span class="o">-</span><span class="mi">1</span><span class="p">][</span><span class="n">key</span><span class="p">]</span> <span class="k">def</span> <span class="nf">has_key</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">key</span><span class="p">):</span> <span class="k">for</span> <span class="n">d</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">dicts</span><span class="p">:</span> <span class="k">if</span> <span class="n">key</span> <span class="ow">in</span> <span class="n">d</span><span class="p">:</span> <span class="k">return</span> <span class="kc">True</span> <span class="k">return</span> <span class="kc">False</span> <span class="k">def</span> <span class="nf">__contains__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">key</span><span class="p">):</span> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">has_key</span><span class="p">(</span><span class="n">key</span><span class="p">)</span> <span class="k">def</span> <span class="nf">get</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">key</span><span class="p">,</span> <span class="n">otherwise</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span> <span class="k">for</span> <span class="n">d</span> <span class="ow">in</span> <span class="nb">reversed</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">dicts</span><span class="p">):</span> <span class="k">if</span> <span class="n">key</span> <span class="ow">in</span> <span class="n">d</span><span class="p">:</span> <span class="k">return</span> <span class="n">d</span><span class="p">[</span><span class="n">key</span><span class="p">]</span> <span class="k">return</span> <span class="n">otherwise</span> <span class="k">def</span> <span class="nf">new</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">values</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span> <span class="sd">"""</span> <span class="sd"> Returns a new context with the same properties, but with only the</span> <span class="sd"> values given in 'values' stored.</span> <span class="sd"> """</span> <span class="n">new_context</span> <span class="o">=</span> <span class="n">copy</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="n">new_context</span><span class="o">.</span><span class="n">_reset_dicts</span><span class="p">(</span><span class="n">values</span><span class="p">)</span> <span class="k">return</span> <span class="n">new_context</span> <span class="k">def</span> <span class="nf">flatten</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> <span class="sd">"""</span> <span class="sd"> Returns self.dicts as one dictionary</span> <span class="sd"> """</span> <span class="n">flat</span> <span class="o">=</span> <span class="p">{}</span> <span class="k">for</span> <span class="n">d</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">dicts</span><span class="p">:</span> <span class="n">flat</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">d</span><span class="p">)</span> <span class="k">return</span> <span class="n">flat</span> <span class="k">def</span> <span class="nf">__eq__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">other</span><span class="p">):</span> <span class="sd">"""</span> <span class="sd"> Compares two contexts by comparing theirs 'dicts' attributes.</span> <span class="sd"> """</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">other</span><span class="p">,</span> <span class="n">BaseContext</span><span class="p">):</span> <span class="c1"># because dictionaries can be put in different order</span> <span class="c1"># we have to flatten them like in templates</span> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">flatten</span><span class="p">()</span> <span class="o">==</span> <span class="n">other</span><span class="o">.</span><span class="n">flatten</span><span class="p">()</span> <span class="c1"># if it's not comparable return false</span> <span class="k">return</span> <span class="kc">False</span> <div class="viewcode-block" id="Context"><a class="viewcode-back" href="../../../ref/templates/api.html#django.template.Context">[docs]</a><span class="k">class</span> <span class="nc">Context</span><span class="p">(</span><span class="n">BaseContext</span><span class="p">):</span> <span class="s2">"A stack container for variable context"</span> <span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">dict_</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">autoescape</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span> <span class="n">current_app</span><span class="o">=</span><span class="n">_current_app_undefined</span><span class="p">,</span> <span class="n">use_l10n</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">use_tz</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span> <span class="k">if</span> <span class="n">current_app</span> <span class="ow">is</span> <span class="ow">not</span> <span class="n">_current_app_undefined</span><span class="p">:</span> <span class="n">warnings</span><span class="o">.</span><span class="n">warn</span><span class="p">(</span> <span class="s2">"The current_app argument of Context is deprecated. Use "</span> <span class="s2">"RequestContext and set the current_app attribute of its "</span> <span class="s2">"request instead."</span><span class="p">,</span> <span class="n">RemovedInDjango110Warning</span><span class="p">,</span> <span class="n">stacklevel</span><span class="o">=</span><span class="mi">2</span><span class="p">)</span> <span class="bp">self</span><span class="o">.</span><span class="n">autoescape</span> <span class="o">=</span> <span class="n">autoescape</span> <span class="bp">self</span><span class="o">.</span><span class="n">_current_app</span> <span class="o">=</span> <span class="n">current_app</span> <span class="bp">self</span><span class="o">.</span><span class="n">use_l10n</span> <span class="o">=</span> <span class="n">use_l10n</span> <span class="bp">self</span><span class="o">.</span><span class="n">use_tz</span> <span class="o">=</span> <span class="n">use_tz</span> <span class="bp">self</span><span class="o">.</span><span class="n">render_context</span> <span class="o">=</span> <span class="n">RenderContext</span><span class="p">()</span> <span class="c1"># Set to the original template -- as opposed to extended or included</span> <span class="c1"># templates -- during rendering, see bind_template.</span> <span class="bp">self</span><span class="o">.</span><span class="n">template</span> <span class="o">=</span> <span class="kc">None</span> <span class="nb">super</span><span class="p">(</span><span class="n">Context</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">__init__</span><span class="p">(</span><span class="n">dict_</span><span class="p">)</span> <span class="nd">@property</span> <span class="k">def</span> <span class="nf">current_app</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> <span class="k">return</span> <span class="kc">None</span> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_current_app</span> <span class="ow">is</span> <span class="n">_current_app_undefined</span> <span class="k">else</span> <span class="bp">self</span><span class="o">.</span><span class="n">_current_app</span> <span class="nd">@contextmanager</span> <span class="k">def</span> <span class="nf">bind_template</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">template</span><span class="p">):</span> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">template</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span> <span class="k">raise</span> <span class="ne">RuntimeError</span><span class="p">(</span><span class="s2">"Context is already bound to a template"</span><span class="p">)</span> <span class="bp">self</span><span class="o">.</span><span class="n">template</span> <span class="o">=</span> <span class="n">template</span> <span class="k">try</span><span class="p">:</span> <span class="k">yield</span> <span class="k">finally</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">template</span> <span class="o">=</span> <span class="kc">None</span> <span class="k">def</span> <span class="nf">__copy__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> <span class="n">duplicate</span> <span class="o">=</span> <span class="nb">super</span><span class="p">(</span><span class="n">Context</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">__copy__</span><span class="p">()</span> <span class="n">duplicate</span><span class="o">.</span><span class="n">render_context</span> <span class="o">=</span> <span class="n">copy</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">render_context</span><span class="p">)</span> <span class="k">return</span> <span class="n">duplicate</span> <div class="viewcode-block" id="Context.update"><a class="viewcode-back" href="../../../ref/templates/api.html#django.template.Context.update">[docs]</a> <span class="k">def</span> <span class="nf">update</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">other_dict</span><span class="p">):</span> <span class="s2">"Pushes other_dict to the stack of dictionaries in the Context"</span> <span class="k">if</span> <span class="ow">not</span> <span class="nb">hasattr</span><span class="p">(</span><span class="n">other_dict</span><span class="p">,</span> <span class="s1">'__getitem__'</span><span class="p">):</span> <span class="k">raise</span> <span class="ne">TypeError</span><span class="p">(</span><span class="s1">'other_dict must be a mapping (dictionary-like) object.'</span><span class="p">)</span> <span class="bp">self</span><span class="o">.</span><span class="n">dicts</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">other_dict</span><span class="p">)</span> <span class="k">return</span> <span class="n">other_dict</span></div></div> <span class="k">class</span> <span class="nc">RenderContext</span><span class="p">(</span><span class="n">BaseContext</span><span class="p">):</span> <span class="sd">"""</span> <span class="sd"> A stack container for storing Template state.</span> <span class="sd"> RenderContext simplifies the implementation of template Nodes by providing a</span> <span class="sd"> safe place to store state between invocations of a node's `render` method.</span> <span class="sd"> The RenderContext also provides scoping rules that are more sensible for</span> <span class="sd"> 'template local' variables. The render context stack is pushed before each</span> <span class="sd"> template is rendered, creating a fresh scope with nothing in it. Name</span> <span class="sd"> resolution fails if a variable is not found at the top of the RequestContext</span> <span class="sd"> stack. Thus, variables are local to a specific template and don't affect the</span> <span class="sd"> rendering of other templates as they would if they were stored in the normal</span> <span class="sd"> template context.</span> <span class="sd"> """</span> <span class="k">def</span> <span class="nf">__iter__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> <span class="k">for</span> <span class="n">d</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">dicts</span><span class="p">[</span><span class="o">-</span><span class="mi">1</span><span class="p">]:</span> <span class="k">yield</span> <span class="n">d</span> <span class="k">def</span> <span class="nf">has_key</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">key</span><span class="p">):</span> <span class="k">return</span> <span class="n">key</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">dicts</span><span class="p">[</span><span class="o">-</span><span class="mi">1</span><span class="p">]</span> <span class="k">def</span> <span class="nf">get</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">key</span><span class="p">,</span> <span class="n">otherwise</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">dicts</span><span class="p">[</span><span class="o">-</span><span class="mi">1</span><span class="p">]</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">key</span><span class="p">,</span> <span class="n">otherwise</span><span class="p">)</span> <span class="k">def</span> <span class="nf">__getitem__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">key</span><span class="p">):</span> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">dicts</span><span class="p">[</span><span class="o">-</span><span class="mi">1</span><span class="p">][</span><span class="n">key</span><span class="p">]</span> <div class="viewcode-block" id="RequestContext"><a class="viewcode-back" href="../../../ref/templates/api.html#django.template.RequestContext">[docs]</a><span class="k">class</span> <span class="nc">RequestContext</span><span class="p">(</span><span class="n">Context</span><span class="p">):</span> <span class="sd">"""</span> <span class="sd"> This subclass of template.Context automatically populates itself using</span> <span class="sd"> the processors defined in the engine's configuration.</span> <span class="sd"> Additional processors can be specified as a list of callables</span> <span class="sd"> using the "processors" keyword argument.</span> <span class="sd"> """</span> <span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">request</span><span class="p">,</span> <span class="n">dict_</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">processors</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">current_app</span><span class="o">=</span><span class="n">_current_app_undefined</span><span class="p">,</span> <span class="n">use_l10n</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">use_tz</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span> <span class="c1"># current_app isn't passed here to avoid triggering the deprecation</span> <span class="c1"># warning in Context.__init__.</span> <span class="nb">super</span><span class="p">(</span><span class="n">RequestContext</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">__init__</span><span class="p">(</span> <span class="n">dict_</span><span class="p">,</span> <span class="n">use_l10n</span><span class="o">=</span><span class="n">use_l10n</span><span class="p">,</span> <span class="n">use_tz</span><span class="o">=</span><span class="n">use_tz</span><span class="p">)</span> <span class="k">if</span> <span class="n">current_app</span> <span class="ow">is</span> <span class="ow">not</span> <span class="n">_current_app_undefined</span><span class="p">:</span> <span class="n">warnings</span><span class="o">.</span><span class="n">warn</span><span class="p">(</span> <span class="s2">"The current_app argument of RequestContext is deprecated. "</span> <span class="s2">"Set the current_app attribute of its request instead."</span><span class="p">,</span> <span class="n">RemovedInDjango110Warning</span><span class="p">,</span> <span class="n">stacklevel</span><span class="o">=</span><span class="mi">2</span><span class="p">)</span> <span class="bp">self</span><span class="o">.</span><span class="n">_current_app</span> <span class="o">=</span> <span class="n">current_app</span> <span class="bp">self</span><span class="o">.</span><span class="n">request</span> <span class="o">=</span> <span class="n">request</span> <span class="bp">self</span><span class="o">.</span><span class="n">_processors</span> <span class="o">=</span> <span class="p">()</span> <span class="k">if</span> <span class="n">processors</span> <span class="ow">is</span> <span class="kc">None</span> <span class="k">else</span> <span class="nb">tuple</span><span class="p">(</span><span class="n">processors</span><span class="p">)</span> <span class="bp">self</span><span class="o">.</span><span class="n">_processors_index</span> <span class="o">=</span> <span class="nb">len</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">dicts</span><span class="p">)</span> <span class="c1"># placeholder for context processors output</span> <span class="bp">self</span><span class="o">.</span><span class="n">update</span><span class="p">({})</span> <span class="c1"># empty dict for any new modifications</span> <span class="c1"># (so that context processors don't overwrite them)</span> <span class="bp">self</span><span class="o">.</span><span class="n">update</span><span class="p">({})</span> <span class="nd">@contextmanager</span> <span class="k">def</span> <span class="nf">bind_template</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">template</span><span class="p">):</span> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">template</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span> <span class="k">raise</span> <span class="ne">RuntimeError</span><span class="p">(</span><span class="s2">"Context is already bound to a template"</span><span class="p">)</span> <span class="bp">self</span><span class="o">.</span><span class="n">template</span> <span class="o">=</span> <span class="n">template</span> <span class="c1"># Set context processors according to the template engine's settings.</span> <span class="n">processors</span> <span class="o">=</span> <span class="p">(</span><span class="n">template</span><span class="o">.</span><span class="n">engine</span><span class="o">.</span><span class="n">template_context_processors</span> <span class="o">+</span> <span class="bp">self</span><span class="o">.</span><span class="n">_processors</span><span class="p">)</span> <span class="n">updates</span> <span class="o">=</span> <span class="p">{}</span> <span class="k">for</span> <span class="n">processor</span> <span class="ow">in</span> <span class="n">processors</span><span class="p">:</span> <span class="n">updates</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">processor</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">request</span><span class="p">))</span> <span class="bp">self</span><span class="o">.</span><span class="n">dicts</span><span class="p">[</span><span class="bp">self</span><span class="o">.</span><span class="n">_processors_index</span><span class="p">]</span> <span class="o">=</span> <span class="n">updates</span> <span class="k">try</span><span class="p">:</span> <span class="k">yield</span> <span class="k">finally</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">template</span> <span class="o">=</span> <span class="kc">None</span> <span class="c1"># Unset context processors.</span> <span class="bp">self</span><span class="o">.</span><span class="n">dicts</span><span class="p">[</span><span class="bp">self</span><span class="o">.</span><span class="n">_processors_index</span><span class="p">]</span> <span class="o">=</span> <span class="p">{}</span> <span class="k">def</span> <span class="nf">new</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">values</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span> <span class="n">new_context</span> <span class="o">=</span> <span class="nb">super</span><span class="p">(</span><span class="n">RequestContext</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">new</span><span class="p">(</span><span class="n">values</span><span class="p">)</span> <span class="c1"># This is for backwards-compatibility: RequestContexts created via</span> <span class="c1"># Context.new don't include values from context processors.</span> <span class="k">if</span> <span class="nb">hasattr</span><span class="p">(</span><span class="n">new_context</span><span class="p">,</span> <span class="s1">'_processors_index'</span><span class="p">):</span> <span class="k">del</span> <span class="n">new_context</span><span class="o">.</span><span class="n">_processors_index</span> <span class="k">return</span> <span class="n">new_context</span></div> <span class="k">def</span> <span class="nf">make_context</span><span class="p">(</span><span class="n">context</span><span class="p">,</span> <span class="n">request</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span> <span class="sd">"""</span> <span class="sd"> Create a suitable Context from a plain dict and optionally an HttpRequest.</span> <span class="sd"> """</span> <span class="k">if</span> <span class="n">request</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span> <span class="n">context</span> <span class="o">=</span> <span class="n">Context</span><span class="p">(</span><span class="n">context</span><span class="p">)</span> <span class="k">else</span><span class="p">:</span> <span class="c1"># The following pattern is required to ensure values from</span> <span class="c1"># context override those from template context processors.</span> <span class="n">original_context</span> <span class="o">=</span> <span class="n">context</span> <span class="n">context</span> <span class="o">=</span> <span class="n">RequestContext</span><span class="p">(</span><span class="n">request</span><span class="p">)</span> <span class="k">if</span> <span class="n">original_context</span><span class="p">:</span> <span class="n">context</span><span class="o">.</span><span class="n">push</span><span class="p">(</span><span class="n">original_context</span><span class="p">)</span> <span class="k">return</span> <span class="n">context</span> </pre></div> </div> </div> </div> <div class="yui-b" id="sidebar"> <div class="sphinxsidebar" role="navigation" aria-label="main navigation"> <div class="sphinxsidebarwrapper"> <h3>Browse</h3> <ul> </ul> <h3>You are here:</h3> <ul> <li> <a href="../../../index.html">Django 1.8.19 documentation</a> <ul><li><a href="../../index.html">Module code</a> <ul><li><a href="../../django.html">django</a> <ul><li>django.template.context</li></ul> </li></ul></li></ul> </li> </ul> <div id="searchbox" style="display: none" role="search"> <h3>Quick search</h3> <form class="search" action="../../../search.html" method="get"> <div><input type="text" name="q" /></div> <div><input type="submit" value="Go" /></div> <input type="hidden" name="check_keywords" value="yes" /> <input type="hidden" name="area" value="default" /> </form> </div> <script type="text/javascript">$('#searchbox').show(0);</script> </div> </div> <h3>Last update:</h3> <p 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