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<h1><a href="../../../index.html">Django 1.11.20 documentation</a></h1>
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<h1>Source code for django.urls.resolvers</h1><div class="highlight"><pre>
<span></span><span class="sd">"""</span>
<span class="sd">This module converts requested URLs to callback view functions.</span>
<span class="sd">RegexURLResolver is the main class here. Its resolve() method takes a URL (as</span>
<span class="sd">a string) and returns a ResolverMatch object which provides access to all</span>
<span class="sd">attributes of the resolved URL match.</span>
<span class="sd">"""</span>
<span class="kn">from</span> <span class="nn">__future__</span> <span class="k">import</span> <span class="n">unicode_literals</span>
<span class="kn">import</span> <span class="nn">functools</span>
<span class="kn">import</span> <span class="nn">re</span>
<span class="kn">import</span> <span class="nn">threading</span>
<span class="kn">from</span> <span class="nn">importlib</span> <span class="k">import</span> <span class="n">import_module</span>
<span class="kn">from</span> <span class="nn">django.conf</span> <span class="k">import</span> <span class="n">settings</span>
<span class="kn">from</span> <span class="nn">django.core.checks</span> <span class="k">import</span> <span class="ne">Warning</span>
<span class="kn">from</span> <span class="nn">django.core.checks.urls</span> <span class="k">import</span> <span class="n">check_resolver</span>
<span class="kn">from</span> <span class="nn">django.core.exceptions</span> <span class="k">import</span> <span class="n">ImproperlyConfigured</span>
<span class="kn">from</span> <span class="nn">django.utils</span> <span class="k">import</span> <span class="n">lru_cache</span><span class="p">,</span> <span class="n">six</span>
<span class="kn">from</span> <span class="nn">django.utils.datastructures</span> <span class="k">import</span> <span class="n">MultiValueDict</span>
<span class="kn">from</span> <span class="nn">django.utils.encoding</span> <span class="k">import</span> <span class="n">force_str</span><span class="p">,</span> <span class="n">force_text</span>
<span class="kn">from</span> <span class="nn">django.utils.functional</span> <span class="k">import</span> <span class="n">cached_property</span>
<span class="kn">from</span> <span class="nn">django.utils.http</span> <span class="k">import</span> <span class="p">(</span>
<span class="n">RFC3986_SUBDELIMS</span><span class="p">,</span> <span class="n">escape_leading_slashes</span><span class="p">,</span> <span class="n">urlquote</span><span class="p">,</span>
<span class="p">)</span>
<span class="kn">from</span> <span class="nn">django.utils.regex_helper</span> <span class="k">import</span> <span class="n">normalize</span>
<span class="kn">from</span> <span class="nn">django.utils.translation</span> <span class="k">import</span> <span class="n">get_language</span>
<span class="kn">from</span> <span class="nn">.exceptions</span> <span class="k">import</span> <span class="n">NoReverseMatch</span><span class="p">,</span> <span class="n">Resolver404</span>
<span class="kn">from</span> <span class="nn">.utils</span> <span class="k">import</span> <span class="n">get_callable</span>
<div class="viewcode-block" id="ResolverMatch"><a class="viewcode-back" href="../../../ref/urlresolvers.html#django.urls.ResolverMatch">[docs]</a><span class="k">class</span> <span class="nc">ResolverMatch</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">func</span><span class="p">,</span> <span class="n">args</span><span class="p">,</span> <span class="n">kwargs</span><span class="p">,</span> <span class="n">url_name</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">app_names</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">namespaces</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">func</span> <span class="o">=</span> <span class="n">func</span>
<span class="bp">self</span><span class="o">.</span><span class="n">args</span> <span class="o">=</span> <span class="n">args</span>
<span class="bp">self</span><span class="o">.</span><span class="n">kwargs</span> <span class="o">=</span> <span class="n">kwargs</span>
<span class="bp">self</span><span class="o">.</span><span class="n">url_name</span> <span class="o">=</span> <span class="n">url_name</span>
<span class="c1"># If a URLRegexResolver doesn't have a namespace or app_name, it passes</span>
<span class="c1"># in an empty value.</span>
<span class="bp">self</span><span class="o">.</span><span class="n">app_names</span> <span class="o">=</span> <span class="p">[</span><span class="n">x</span> <span class="k">for</span> <span class="n">x</span> <span class="ow">in</span> <span class="n">app_names</span> <span class="k">if</span> <span class="n">x</span><span class="p">]</span> <span class="k">if</span> <span class="n">app_names</span> <span class="k">else</span> <span class="p">[]</span>
<span class="bp">self</span><span class="o">.</span><span class="n">app_name</span> <span class="o">=</span> <span class="s1">':'</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">app_names</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">namespaces</span> <span class="o">=</span> <span class="p">[</span><span class="n">x</span> <span class="k">for</span> <span class="n">x</span> <span class="ow">in</span> <span class="n">namespaces</span> <span class="k">if</span> <span class="n">x</span><span class="p">]</span> <span class="k">if</span> <span class="n">namespaces</span> <span class="k">else</span> <span class="p">[]</span>
<span class="bp">self</span><span class="o">.</span><span class="n">namespace</span> <span class="o">=</span> <span class="s1">':'</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">namespaces</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="nb">hasattr</span><span class="p">(</span><span class="n">func</span><span class="p">,</span> <span class="s1">'__name__'</span><span class="p">):</span>
<span class="c1"># A class-based view</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_func_path</span> <span class="o">=</span> <span class="s1">'.'</span><span class="o">.</span><span class="n">join</span><span class="p">([</span><span class="n">func</span><span class="o">.</span><span class="vm">__class__</span><span class="o">.</span><span class="vm">__module__</span><span class="p">,</span> <span class="n">func</span><span class="o">.</span><span class="vm">__class__</span><span class="o">.</span><span class="vm">__name__</span><span class="p">])</span>
<span class="k">else</span><span class="p">:</span>
<span class="c1"># A function-based view</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_func_path</span> <span class="o">=</span> <span class="s1">'.'</span><span class="o">.</span><span class="n">join</span><span class="p">([</span><span class="n">func</span><span class="o">.</span><span class="vm">__module__</span><span class="p">,</span> <span class="n">func</span><span class="o">.</span><span class="vm">__name__</span><span class="p">])</span>
<span class="n">view_path</span> <span class="o">=</span> <span class="n">url_name</span> <span class="ow">or</span> <span class="bp">self</span><span class="o">.</span><span class="n">_func_path</span>
<span class="bp">self</span><span class="o">.</span><span class="n">view_name</span> <span class="o">=</span> <span class="s1">':'</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">namespaces</span> <span class="o">+</span> <span class="p">[</span><span class="n">view_path</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">index</span><span class="p">):</span>
<span class="k">return</span> <span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">func</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">args</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">kwargs</span><span class="p">)[</span><span class="n">index</span><span class="p">]</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="s2">"ResolverMatch(func=</span><span class="si">%s</span><span class="s2">, args=</span><span class="si">%s</span><span class="s2">, kwargs=</span><span class="si">%s</span><span class="s2">, url_name=</span><span class="si">%s</span><span class="s2">, app_names=</span><span class="si">%s</span><span class="s2">, namespaces=</span><span class="si">%s</span><span class="s2">)"</span> <span class="o">%</span> <span class="p">(</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_func_path</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">args</span><span class="p">,</span> <span class="bp">self</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">url_name</span><span class="p">,</span>
<span class="bp">self</span><span class="o">.</span><span class="n">app_names</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">namespaces</span><span class="p">,</span>
<span class="p">)</span></div>
<span class="nd">@lru_cache</span><span class="o">.</span><span class="n">lru_cache</span><span class="p">(</span><span class="n">maxsize</span><span class="o">=</span><span class="kc">None</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">get_resolver</span><span class="p">(</span><span class="n">urlconf</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="k">if</span> <span class="n">urlconf</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="kn">from</span> <span class="nn">django.conf</span> <span class="k">import</span> <span class="n">settings</span>
<span class="n">urlconf</span> <span class="o">=</span> <span class="n">settings</span><span class="o">.</span><span class="n">ROOT_URLCONF</span>
<span class="k">return</span> <span class="n">RegexURLResolver</span><span class="p">(</span><span class="sa">r</span><span class="s1">'^/'</span><span class="p">,</span> <span class="n">urlconf</span><span class="p">)</span>
<span class="nd">@lru_cache</span><span class="o">.</span><span class="n">lru_cache</span><span class="p">(</span><span class="n">maxsize</span><span class="o">=</span><span class="kc">None</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">get_ns_resolver</span><span class="p">(</span><span class="n">ns_pattern</span><span class="p">,</span> <span class="n">resolver</span><span class="p">):</span>
<span class="c1"># Build a namespaced resolver for the given parent URLconf pattern.</span>
<span class="c1"># This makes it possible to have captured parameters in the parent</span>
<span class="c1"># URLconf pattern.</span>
<span class="n">ns_resolver</span> <span class="o">=</span> <span class="n">RegexURLResolver</span><span class="p">(</span><span class="n">ns_pattern</span><span class="p">,</span> <span class="n">resolver</span><span class="o">.</span><span class="n">url_patterns</span><span class="p">)</span>
<span class="k">return</span> <span class="n">RegexURLResolver</span><span class="p">(</span><span class="sa">r</span><span class="s1">'^/'</span><span class="p">,</span> <span class="p">[</span><span class="n">ns_resolver</span><span class="p">])</span>
<span class="k">class</span> <span class="nc">LocaleRegexDescriptor</span><span class="p">(</span><span class="nb">object</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">instance</span><span class="p">,</span> <span class="bp">cls</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Return a compiled regular expression based on the active language.</span>
<span class="sd"> """</span>
<span class="k">if</span> <span class="n">instance</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">return</span> <span class="bp">self</span>
<span class="c1"># As a performance optimization, if the given regex string is a regular</span>
<span class="c1"># string (not a lazily-translated string proxy), compile it once and</span>
<span class="c1"># avoid per-language compilation.</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">instance</span><span class="o">.</span><span class="n">_regex</span><span class="p">,</span> <span class="n">six</span><span class="o">.</span><span class="n">string_types</span><span class="p">):</span>
<span class="n">instance</span><span class="o">.</span><span class="vm">__dict__</span><span class="p">[</span><span class="s1">'regex'</span><span class="p">]</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_compile</span><span class="p">(</span><span class="n">instance</span><span class="o">.</span><span class="n">_regex</span><span class="p">)</span>
<span class="k">return</span> <span class="n">instance</span><span class="o">.</span><span class="vm">__dict__</span><span class="p">[</span><span class="s1">'regex'</span><span class="p">]</span>
<span class="n">language_code</span> <span class="o">=</span> <span class="n">get_language</span><span class="p">()</span>
<span class="k">if</span> <span class="n">language_code</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">instance</span><span class="o">.</span><span class="n">_regex_dict</span><span class="p">:</span>
<span class="n">instance</span><span class="o">.</span><span class="n">_regex_dict</span><span class="p">[</span><span class="n">language_code</span><span class="p">]</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_compile</span><span class="p">(</span><span class="n">force_text</span><span class="p">(</span><span class="n">instance</span><span class="o">.</span><span class="n">_regex</span><span class="p">))</span>
<span class="k">return</span> <span class="n">instance</span><span class="o">.</span><span class="n">_regex_dict</span><span class="p">[</span><span class="n">language_code</span><span class="p">]</span>
<span class="k">def</span> <span class="nf">_compile</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">regex</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Compile and return the given regular expression.</span>
<span class="sd"> """</span>
<span class="k">try</span><span class="p">:</span>
<span class="k">return</span> <span class="n">re</span><span class="o">.</span><span class="n">compile</span><span class="p">(</span><span class="n">regex</span><span class="p">,</span> <span class="n">re</span><span class="o">.</span><span class="n">UNICODE</span><span class="p">)</span>
<span class="k">except</span> <span class="n">re</span><span class="o">.</span><span class="n">error</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span>
<span class="k">raise</span> <span class="n">ImproperlyConfigured</span><span class="p">(</span>
<span class="s1">'"</span><span class="si">%s</span><span class="s1">" is not a valid regular expression: </span><span class="si">%s</span><span class="s1">'</span> <span class="o">%</span>
<span class="p">(</span><span class="n">regex</span><span class="p">,</span> <span class="n">six</span><span class="o">.</span><span class="n">text_type</span><span class="p">(</span><span class="n">e</span><span class="p">))</span>
<span class="p">)</span>
<span class="k">class</span> <span class="nc">LocaleRegexProvider</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> A mixin to provide a default regex property which can vary by active</span>
<span class="sd"> language.</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">regex</span><span class="p">):</span>
<span class="c1"># regex is either a string representing a regular expression, or a</span>
<span class="c1"># translatable string (using ugettext_lazy) representing a regular</span>
<span class="c1"># expression.</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_regex</span> <span class="o">=</span> <span class="n">regex</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_regex_dict</span> <span class="o">=</span> <span class="p">{}</span>
<span class="n">regex</span> <span class="o">=</span> <span class="n">LocaleRegexDescriptor</span><span class="p">()</span>
<span class="k">def</span> <span class="nf">describe</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Format the URL pattern for display in warning messages.</span>
<span class="sd"> """</span>
<span class="n">description</span> <span class="o">=</span> <span class="s2">"'</span><span class="si">{}</span><span class="s2">'"</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">regex</span><span class="o">.</span><span class="n">pattern</span><span class="p">)</span>
<span class="k">if</span> <span class="nb">getattr</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="s1">'name'</span><span class="p">,</span> <span class="kc">False</span><span class="p">):</span>
<span class="n">description</span> <span class="o">+=</span> <span class="s2">" [name='</span><span class="si">{}</span><span class="s2">']"</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">name</span><span class="p">)</span>
<span class="k">return</span> <span class="n">description</span>
<span class="k">def</span> <span class="nf">_check_pattern_startswith_slash</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Check that the pattern does not begin with a forward slash.</span>
<span class="sd"> """</span>
<span class="n">regex_pattern</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">regex</span><span class="o">.</span><span class="n">pattern</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">settings</span><span class="o">.</span><span class="n">APPEND_SLASH</span><span class="p">:</span>
<span class="c1"># Skip check as it can be useful to start a URL pattern with a slash</span>
<span class="c1"># when APPEND_SLASH=False.</span>
<span class="k">return</span> <span class="p">[]</span>
<span class="k">if</span> <span class="p">(</span><span class="n">regex_pattern</span><span class="o">.</span><span class="n">startswith</span><span class="p">(</span><span class="s1">'/'</span><span class="p">)</span> <span class="ow">or</span> <span class="n">regex_pattern</span><span class="o">.</span><span class="n">startswith</span><span class="p">(</span><span class="s1">'^/'</span><span class="p">))</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">regex_pattern</span><span class="o">.</span><span class="n">endswith</span><span class="p">(</span><span class="s1">'/'</span><span class="p">):</span>
<span class="n">warning</span> <span class="o">=</span> <span class="ne">Warning</span><span class="p">(</span>
<span class="s2">"Your URL pattern </span><span class="si">{}</span><span class="s2"> has a regex beginning with a '/'. Remove this "</span>
<span class="s2">"slash as it is unnecessary. If this pattern is targeted in an "</span>
<span class="s2">"include(), ensure the include() pattern has a trailing '/'."</span><span class="o">.</span><span class="n">format</span><span class="p">(</span>
<span class="bp">self</span><span class="o">.</span><span class="n">describe</span><span class="p">()</span>
<span class="p">),</span>
<span class="nb">id</span><span class="o">=</span><span class="s2">"urls.W002"</span><span class="p">,</span>
<span class="p">)</span>
<span class="k">return</span> <span class="p">[</span><span class="n">warning</span><span class="p">]</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">return</span> <span class="p">[]</span>
<span class="k">class</span> <span class="nc">RegexURLPattern</span><span class="p">(</span><span class="n">LocaleRegexProvider</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">regex</span><span class="p">,</span> <span class="n">callback</span><span class="p">,</span> <span class="n">default_args</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">name</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="n">LocaleRegexProvider</span><span class="o">.</span><span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">regex</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">callback</span> <span class="o">=</span> <span class="n">callback</span> <span class="c1"># the view</span>
<span class="bp">self</span><span class="o">.</span><span class="n">default_args</span> <span class="o">=</span> <span class="n">default_args</span> <span class="ow">or</span> <span class="p">{}</span>
<span class="bp">self</span><span class="o">.</span><span class="n">name</span> <span class="o">=</span> <span class="n">name</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="n">force_str</span><span class="p">(</span><span class="s1">'<</span><span class="si">%s</span><span class="s1"> </span><span class="si">%s</span><span class="s1"> </span><span class="si">%s</span><span class="s1">>'</span> <span class="o">%</span> <span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="vm">__class__</span><span class="o">.</span><span class="vm">__name__</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">name</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">regex</span><span class="o">.</span><span class="n">pattern</span><span class="p">))</span>
<span class="k">def</span> <span class="nf">check</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="n">warnings</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_check_pattern_name</span><span class="p">()</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">warnings</span><span class="p">:</span>
<span class="n">warnings</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_check_pattern_startswith_slash</span><span class="p">()</span>
<span class="k">return</span> <span class="n">warnings</span>
<span class="k">def</span> <span class="nf">_check_pattern_name</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Check that the pattern name does not contain a colon.</span>
<span class="sd"> """</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">name</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span> <span class="ow">and</span> <span class="s2">":"</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">name</span><span class="p">:</span>
<span class="n">warning</span> <span class="o">=</span> <span class="ne">Warning</span><span class="p">(</span>
<span class="s2">"Your URL pattern </span><span class="si">{}</span><span class="s2"> has a name including a ':'. Remove the colon, to "</span>
<span class="s2">"avoid ambiguous namespace references."</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">describe</span><span class="p">()),</span>
<span class="nb">id</span><span class="o">=</span><span class="s2">"urls.W003"</span><span class="p">,</span>
<span class="p">)</span>
<span class="k">return</span> <span class="p">[</span><span class="n">warning</span><span class="p">]</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">return</span> <span class="p">[]</span>
<span class="k">def</span> <span class="nf">resolve</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">path</span><span class="p">):</span>
<span class="n">match</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">regex</span><span class="o">.</span><span class="n">search</span><span class="p">(</span><span class="n">path</span><span class="p">)</span>
<span class="k">if</span> <span class="n">match</span><span class="p">:</span>
<span class="c1"># If there are any named groups, use those as kwargs, ignoring</span>
<span class="c1"># non-named groups. Otherwise, pass all non-named arguments as</span>
<span class="c1"># positional arguments.</span>
<span class="n">kwargs</span> <span class="o">=</span> <span class="n">match</span><span class="o">.</span><span class="n">groupdict</span><span class="p">()</span>
<span class="n">args</span> <span class="o">=</span> <span class="p">()</span> <span class="k">if</span> <span class="n">kwargs</span> <span class="k">else</span> <span class="n">match</span><span class="o">.</span><span class="n">groups</span><span class="p">()</span>
<span class="c1"># In both cases, pass any extra_kwargs as **kwargs.</span>
<span class="n">kwargs</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">default_args</span><span class="p">)</span>
<span class="k">return</span> <span class="n">ResolverMatch</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">callback</span><span class="p">,</span> <span class="n">args</span><span class="p">,</span> <span class="n">kwargs</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">name</span><span class="p">)</span>
<span class="nd">@cached_property</span>
<span class="k">def</span> <span class="nf">lookup_str</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> A string that identifies the view (e.g. 'path.to.view_function' or</span>
<span class="sd"> 'path.to.ClassBasedView').</span>
<span class="sd"> """</span>
<span class="n">callback</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">callback</span>
<span class="c1"># Python 3.5 collapses nested partials, so can change "while" to "if"</span>
<span class="c1"># when it's the minimum supported version.</span>
<span class="k">while</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">callback</span><span class="p">,</span> <span class="n">functools</span><span class="o">.</span><span class="n">partial</span><span class="p">):</span>
<span class="n">callback</span> <span class="o">=</span> <span class="n">callback</span><span class="o">.</span><span class="n">func</span>
<span class="k">if</span> <span class="ow">not</span> <span class="nb">hasattr</span><span class="p">(</span><span class="n">callback</span><span class="p">,</span> <span class="s1">'__name__'</span><span class="p">):</span>
<span class="k">return</span> <span class="n">callback</span><span class="o">.</span><span class="vm">__module__</span> <span class="o">+</span> <span class="s2">"."</span> <span class="o">+</span> <span class="n">callback</span><span class="o">.</span><span class="vm">__class__</span><span class="o">.</span><span class="vm">__name__</span>
<span class="k">elif</span> <span class="n">six</span><span class="o">.</span><span class="n">PY3</span><span class="p">:</span>
<span class="k">return</span> <span class="n">callback</span><span class="o">.</span><span class="vm">__module__</span> <span class="o">+</span> <span class="s2">"."</span> <span class="o">+</span> <span class="n">callback</span><span class="o">.</span><span class="vm">__qualname__</span>
<span class="k">else</span><span class="p">:</span>
<span class="c1"># PY2 does not support __qualname__</span>
<span class="k">return</span> <span class="n">callback</span><span class="o">.</span><span class="vm">__module__</span> <span class="o">+</span> <span class="s2">"."</span> <span class="o">+</span> <span class="n">callback</span><span class="o">.</span><span class="vm">__name__</span>
<span class="k">class</span> <span class="nc">RegexURLResolver</span><span class="p">(</span><span class="n">LocaleRegexProvider</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">regex</span><span class="p">,</span> <span class="n">urlconf_name</span><span class="p">,</span> <span class="n">default_kwargs</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">app_name</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">namespace</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="n">LocaleRegexProvider</span><span class="o">.</span><span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">regex</span><span class="p">)</span>
<span class="c1"># urlconf_name is the dotted Python path to the module defining</span>
<span class="c1"># urlpatterns. It may also be an object with an urlpatterns attribute</span>
<span class="c1"># or urlpatterns itself.</span>
<span class="bp">self</span><span class="o">.</span><span class="n">urlconf_name</span> <span class="o">=</span> <span class="n">urlconf_name</span>
<span class="bp">self</span><span class="o">.</span><span class="n">callback</span> <span class="o">=</span> <span class="kc">None</span>
<span class="bp">self</span><span class="o">.</span><span class="n">default_kwargs</span> <span class="o">=</span> <span class="n">default_kwargs</span> <span class="ow">or</span> <span class="p">{}</span>
<span class="bp">self</span><span class="o">.</span><span class="n">namespace</span> <span class="o">=</span> <span class="n">namespace</span>
<span class="bp">self</span><span class="o">.</span><span class="n">app_name</span> <span class="o">=</span> <span class="n">app_name</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_reverse_dict</span> <span class="o">=</span> <span class="p">{}</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_namespace_dict</span> <span class="o">=</span> <span class="p">{}</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_app_dict</span> <span class="o">=</span> <span class="p">{}</span>
<span class="c1"># set of dotted paths to all functions and classes that are used in</span>
<span class="c1"># urlpatterns</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_callback_strs</span> <span class="o">=</span> <span class="nb">set</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_populated</span> <span class="o">=</span> <span class="kc">False</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_local</span> <span class="o">=</span> <span class="n">threading</span><span class="o">.</span><span class="n">local</span><span class="p">()</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">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">urlconf_name</span><span class="p">,</span> <span class="nb">list</span><span class="p">)</span> <span class="ow">and</span> <span class="nb">len</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">urlconf_name</span><span class="p">):</span>
<span class="c1"># Don't bother to output the whole list, it can be huge</span>
<span class="n">urlconf_repr</span> <span class="o">=</span> <span class="s1">'<</span><span class="si">%s</span><span class="s1"> list>'</span> <span class="o">%</span> <span class="bp">self</span><span class="o">.</span><span class="n">urlconf_name</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="vm">__class__</span><span class="o">.</span><span class="vm">__name__</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">urlconf_repr</span> <span class="o">=</span> <span class="nb">repr</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">urlconf_name</span><span class="p">)</span>
<span class="k">return</span> <span class="nb">str</span><span class="p">(</span><span class="s1">'<</span><span class="si">%s</span><span class="s1"> </span><span class="si">%s</span><span class="s1"> (</span><span class="si">%s</span><span class="s1">:</span><span class="si">%s</span><span class="s1">) </span><span class="si">%s</span><span class="s1">>'</span><span class="p">)</span> <span class="o">%</span> <span class="p">(</span>
<span class="bp">self</span><span class="o">.</span><span class="vm">__class__</span><span class="o">.</span><span class="vm">__name__</span><span class="p">,</span> <span class="n">urlconf_repr</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">app_name</span><span class="p">,</span>
<span class="bp">self</span><span class="o">.</span><span class="n">namespace</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">regex</span><span class="o">.</span><span class="n">pattern</span><span class="p">,</span>
<span class="p">)</span>
<span class="k">def</span> <span class="nf">check</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="n">warnings</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_check_include_trailing_dollar</span><span class="p">()</span>
<span class="k">for</span> <span class="n">pattern</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">url_patterns</span><span class="p">:</span>
<span class="n">warnings</span><span class="o">.</span><span class="n">extend</span><span class="p">(</span><span class="n">check_resolver</span><span class="p">(</span><span class="n">pattern</span><span class="p">))</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">warnings</span><span class="p">:</span>
<span class="n">warnings</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_check_pattern_startswith_slash</span><span class="p">()</span>
<span class="k">return</span> <span class="n">warnings</span>
<span class="k">def</span> <span class="nf">_check_include_trailing_dollar</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> Check that include is not used with a regex ending with a dollar.</span>
<span class="sd"> """</span>
<span class="n">regex_pattern</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">regex</span><span class="o">.</span><span class="n">pattern</span>
<span class="k">if</span> <span class="n">regex_pattern</span><span class="o">.</span><span class="n">endswith</span><span class="p">(</span><span class="s1">'$'</span><span class="p">)</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">regex_pattern</span><span class="o">.</span><span class="n">endswith</span><span class="p">(</span><span class="sa">r</span><span class="s1">'\$'</span><span class="p">):</span>
<span class="n">warning</span> <span class="o">=</span> <span class="ne">Warning</span><span class="p">(</span>
<span class="s2">"Your URL pattern </span><span class="si">{}</span><span class="s2"> uses include with a regex ending with a '$'. "</span>
<span class="s2">"Remove the dollar from the regex to avoid problems including "</span>
<span class="s2">"URLs."</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">describe</span><span class="p">()),</span>
<span class="nb">id</span><span class="o">=</span><span class="s2">"urls.W001"</span><span class="p">,</span>
<span class="p">)</span>
<span class="k">return</span> <span class="p">[</span><span class="n">warning</span><span class="p">]</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">return</span> <span class="p">[]</span>
<span class="k">def</span> <span class="nf">_populate</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="c1"># Short-circuit if called recursively in this thread to prevent</span>
<span class="c1"># infinite recursion. Concurrent threads may call this at the same</span>
<span class="c1"># time and will need to continue, so set 'populating' on a</span>
<span class="c1"># thread-local variable.</span>
<span class="k">if</span> <span class="nb">getattr</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_local</span><span class="p">,</span> <span class="s1">'populating'</span><span class="p">,</span> <span class="kc">False</span><span class="p">):</span>
<span class="k">return</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_local</span><span class="o">.</span><span class="n">populating</span> <span class="o">=</span> <span class="kc">True</span>
<span class="n">lookups</span> <span class="o">=</span> <span class="n">MultiValueDict</span><span class="p">()</span>
<span class="n">namespaces</span> <span class="o">=</span> <span class="p">{}</span>
<span class="n">apps</span> <span class="o">=</span> <span class="p">{}</span>
<span class="n">language_code</span> <span class="o">=</span> <span class="n">get_language</span><span class="p">()</span>
<span class="k">for</span> <span class="n">pattern</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">url_patterns</span><span class="p">):</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">pattern</span><span class="p">,</span> <span class="n">RegexURLPattern</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_callback_strs</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">pattern</span><span class="o">.</span><span class="n">lookup_str</span><span class="p">)</span>
<span class="n">p_pattern</span> <span class="o">=</span> <span class="n">pattern</span><span class="o">.</span><span class="n">regex</span><span class="o">.</span><span class="n">pattern</span>
<span class="k">if</span> <span class="n">p_pattern</span><span class="o">.</span><span class="n">startswith</span><span class="p">(</span><span class="s1">'^'</span><span class="p">):</span>
<span class="n">p_pattern</span> <span class="o">=</span> <span class="n">p_pattern</span><span class="p">[</span><span class="mi">1</span><span class="p">:]</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">pattern</span><span class="p">,</span> <span class="n">RegexURLResolver</span><span class="p">):</span>
<span class="k">if</span> <span class="n">pattern</span><span class="o">.</span><span class="n">namespace</span><span class="p">:</span>
<span class="n">namespaces</span><span class="p">[</span><span class="n">pattern</span><span class="o">.</span><span class="n">namespace</span><span class="p">]</span> <span class="o">=</span> <span class="p">(</span><span class="n">p_pattern</span><span class="p">,</span> <span class="n">pattern</span><span class="p">)</span>
<span class="k">if</span> <span class="n">pattern</span><span class="o">.</span><span class="n">app_name</span><span class="p">:</span>
<span class="n">apps</span><span class="o">.</span><span class="n">setdefault</span><span class="p">(</span><span class="n">pattern</span><span class="o">.</span><span class="n">app_name</span><span class="p">,</span> <span class="p">[])</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">pattern</span><span class="o">.</span><span class="n">namespace</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">parent_pat</span> <span class="o">=</span> <span class="n">pattern</span><span class="o">.</span><span class="n">regex</span><span class="o">.</span><span class="n">pattern</span>
<span class="k">for</span> <span class="n">name</span> <span class="ow">in</span> <span class="n">pattern</span><span class="o">.</span><span class="n">reverse_dict</span><span class="p">:</span>
<span class="k">for</span> <span class="n">matches</span><span class="p">,</span> <span class="n">pat</span><span class="p">,</span> <span class="n">defaults</span> <span class="ow">in</span> <span class="n">pattern</span><span class="o">.</span><span class="n">reverse_dict</span><span class="o">.</span><span class="n">getlist</span><span class="p">(</span><span class="n">name</span><span class="p">):</span>
<span class="n">new_matches</span> <span class="o">=</span> <span class="n">normalize</span><span class="p">(</span><span class="n">parent_pat</span> <span class="o">+</span> <span class="n">pat</span><span class="p">)</span>
<span class="n">lookups</span><span class="o">.</span><span class="n">appendlist</span><span class="p">(</span>
<span class="n">name</span><span class="p">,</span>
<span class="p">(</span>
<span class="n">new_matches</span><span class="p">,</span>
<span class="n">p_pattern</span> <span class="o">+</span> <span class="n">pat</span><span class="p">,</span>
<span class="nb">dict</span><span class="p">(</span><span class="n">defaults</span><span class="p">,</span> <span class="o">**</span><span class="n">pattern</span><span class="o">.</span><span class="n">default_kwargs</span><span class="p">),</span>
<span class="p">)</span>
<span class="p">)</span>
<span class="k">for</span> <span class="n">namespace</span><span class="p">,</span> <span class="p">(</span><span class="n">prefix</span><span class="p">,</span> <span class="n">sub_pattern</span><span class="p">)</span> <span class="ow">in</span> <span class="n">pattern</span><span class="o">.</span><span class="n">namespace_dict</span><span class="o">.</span><span class="n">items</span><span class="p">():</span>
<span class="n">namespaces</span><span class="p">[</span><span class="n">namespace</span><span class="p">]</span> <span class="o">=</span> <span class="p">(</span><span class="n">p_pattern</span> <span class="o">+</span> <span class="n">prefix</span><span class="p">,</span> <span class="n">sub_pattern</span><span class="p">)</span>
<span class="k">for</span> <span class="n">app_name</span><span class="p">,</span> <span class="n">namespace_list</span> <span class="ow">in</span> <span class="n">pattern</span><span class="o">.</span><span class="n">app_dict</span><span class="o">.</span><span class="n">items</span><span class="p">():</span>
<span class="n">apps</span><span class="o">.</span><span class="n">setdefault</span><span class="p">(</span><span class="n">app_name</span><span class="p">,</span> <span class="p">[])</span><span class="o">.</span><span class="n">extend</span><span class="p">(</span><span class="n">namespace_list</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="nb">getattr</span><span class="p">(</span><span class="n">pattern</span><span class="o">.</span><span class="n">_local</span><span class="p">,</span> <span class="s1">'populating'</span><span class="p">,</span> <span class="kc">False</span><span class="p">):</span>
<span class="n">pattern</span><span class="o">.</span><span class="n">_populate</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_callback_strs</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">pattern</span><span class="o">.</span><span class="n">_callback_strs</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">bits</span> <span class="o">=</span> <span class="n">normalize</span><span class="p">(</span><span class="n">p_pattern</span><span class="p">)</span>
<span class="n">lookups</span><span class="o">.</span><span class="n">appendlist</span><span class="p">(</span><span class="n">pattern</span><span class="o">.</span><span class="n">callback</span><span class="p">,</span> <span class="p">(</span><span class="n">bits</span><span class="p">,</span> <span class="n">p_pattern</span><span class="p">,</span> <span class="n">pattern</span><span class="o">.</span><span class="n">default_args</span><span class="p">))</span>
<span class="k">if</span> <span class="n">pattern</span><span class="o">.</span><span class="n">name</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">lookups</span><span class="o">.</span><span class="n">appendlist</span><span class="p">(</span><span class="n">pattern</span><span class="o">.</span><span class="n">name</span><span class="p">,</span> <span class="p">(</span><span class="n">bits</span><span class="p">,</span> <span class="n">p_pattern</span><span class="p">,</span> <span class="n">pattern</span><span class="o">.</span><span class="n">default_args</span><span class="p">))</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_reverse_dict</span><span class="p">[</span><span class="n">language_code</span><span class="p">]</span> <span class="o">=</span> <span class="n">lookups</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_namespace_dict</span><span class="p">[</span><span class="n">language_code</span><span class="p">]</span> <span class="o">=</span> <span class="n">namespaces</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_app_dict</span><span class="p">[</span><span class="n">language_code</span><span class="p">]</span> <span class="o">=</span> <span class="n">apps</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_populated</span> <span class="o">=</span> <span class="kc">True</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_local</span><span class="o">.</span><span class="n">populating</span> <span class="o">=</span> <span class="kc">False</span>
<span class="nd">@property</span>
<span class="k">def</span> <span class="nf">reverse_dict</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="n">language_code</span> <span class="o">=</span> <span class="n">get_language</span><span class="p">()</span>
<span class="k">if</span> <span class="n">language_code</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_reverse_dict</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_populate</span><span class="p">()</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_reverse_dict</span><span class="p">[</span><span class="n">language_code</span><span class="p">]</span>
<span class="nd">@property</span>
<span class="k">def</span> <span class="nf">namespace_dict</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="n">language_code</span> <span class="o">=</span> <span class="n">get_language</span><span class="p">()</span>
<span class="k">if</span> <span class="n">language_code</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_namespace_dict</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_populate</span><span class="p">()</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_namespace_dict</span><span class="p">[</span><span class="n">language_code</span><span class="p">]</span>
<span class="nd">@property</span>
<span class="k">def</span> <span class="nf">app_dict</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="n">language_code</span> <span class="o">=</span> <span class="n">get_language</span><span class="p">()</span>
<span class="k">if</span> <span class="n">language_code</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_app_dict</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_populate</span><span class="p">()</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_app_dict</span><span class="p">[</span><span class="n">language_code</span><span class="p">]</span>
<span class="k">def</span> <span class="nf">_is_callback</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">):</span>
<span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_populated</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_populate</span><span class="p">()</span>
<span class="k">return</span> <span class="n">name</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_callback_strs</span>
<span class="k">def</span> <span class="nf">resolve</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">path</span><span class="p">):</span>
<span class="n">path</span> <span class="o">=</span> <span class="n">force_text</span><span class="p">(</span><span class="n">path</span><span class="p">)</span> <span class="c1"># path may be a reverse_lazy object</span>
<span class="n">tried</span> <span class="o">=</span> <span class="p">[]</span>
<span class="n">match</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">regex</span><span class="o">.</span><span class="n">search</span><span class="p">(</span><span class="n">path</span><span class="p">)</span>
<span class="k">if</span> <span class="n">match</span><span class="p">:</span>
<span class="n">new_path</span> <span class="o">=</span> <span class="n">path</span><span class="p">[</span><span class="n">match</span><span class="o">.</span><span class="n">end</span><span class="p">():]</span>
<span class="k">for</span> <span class="n">pattern</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">url_patterns</span><span class="p">:</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">sub_match</span> <span class="o">=</span> <span class="n">pattern</span><span class="o">.</span><span class="n">resolve</span><span class="p">(</span><span class="n">new_path</span><span class="p">)</span>
<span class="k">except</span> <span class="n">Resolver404</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span>
<span class="n">sub_tried</span> <span class="o">=</span> <span class="n">e</span><span class="o">.</span><span class="n">args</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="s1">'tried'</span><span class="p">)</span>
<span class="k">if</span> <span class="n">sub_tried</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">tried</span><span class="o">.</span><span class="n">extend</span><span class="p">([</span><span class="n">pattern</span><span class="p">]</span> <span class="o">+</span> <span class="n">t</span> <span class="k">for</span> <span class="n">t</span> <span class="ow">in</span> <span class="n">sub_tried</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">tried</span><span class="o">.</span><span class="n">append</span><span class="p">([</span><span class="n">pattern</span><span class="p">])</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">if</span> <span class="n">sub_match</span><span class="p">:</span>
<span class="c1"># Merge captured arguments in match with submatch</span>
<span class="n">sub_match_dict</span> <span class="o">=</span> <span class="nb">dict</span><span class="p">(</span><span class="n">match</span><span class="o">.</span><span class="n">groupdict</span><span class="p">(),</span> <span class="o">**</span><span class="bp">self</span><span class="o">.</span><span class="n">default_kwargs</span><span class="p">)</span>
<span class="n">sub_match_dict</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">sub_match</span><span class="o">.</span><span class="n">kwargs</span><span class="p">)</span>
<span class="c1"># If there are *any* named groups, ignore all non-named groups.</span>
<span class="c1"># Otherwise, pass all non-named arguments as positional arguments.</span>
<span class="n">sub_match_args</span> <span class="o">=</span> <span class="n">sub_match</span><span class="o">.</span><span class="n">args</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">sub_match_dict</span><span class="p">:</span>
<span class="n">sub_match_args</span> <span class="o">=</span> <span class="n">match</span><span class="o">.</span><span class="n">groups</span><span class="p">()</span> <span class="o">+</span> <span class="n">sub_match</span><span class="o">.</span><span class="n">args</span>
<span class="k">return</span> <span class="n">ResolverMatch</span><span class="p">(</span>
<span class="n">sub_match</span><span class="o">.</span><span class="n">func</span><span class="p">,</span>
<span class="n">sub_match_args</span><span class="p">,</span>
<span class="n">sub_match_dict</span><span class="p">,</span>
<span class="n">sub_match</span><span class="o">.</span><span class="n">url_name</span><span class="p">,</span>
<span class="p">[</span><span class="bp">self</span><span class="o">.</span><span class="n">app_name</span><span class="p">]</span> <span class="o">+</span> <span class="n">sub_match</span><span class="o">.</span><span class="n">app_names</span><span class="p">,</span>
<span class="p">[</span><span class="bp">self</span><span class="o">.</span><span class="n">namespace</span><span class="p">]</span> <span class="o">+</span> <span class="n">sub_match</span><span class="o">.</span><span class="n">namespaces</span><span class="p">,</span>
<span class="p">)</span>
<span class="n">tried</span><span class="o">.</span><span class="n">append</span><span class="p">([</span><span class="n">pattern</span><span class="p">])</span>
<span class="k">raise</span> <span class="n">Resolver404</span><span class="p">({</span><span class="s1">'tried'</span><span class="p">:</span> <span class="n">tried</span><span class="p">,</span> <span class="s1">'path'</span><span class="p">:</span> <span class="n">new_path</span><span class="p">})</span>
<span class="k">raise</span> <span class="n">Resolver404</span><span class="p">({</span><span class="s1">'path'</span><span class="p">:</span> <span class="n">path</span><span class="p">})</span>
<span class="nd">@cached_property</span>
<span class="k">def</span> <span class="nf">urlconf_module</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">urlconf_name</span><span class="p">,</span> <span class="n">six</span><span class="o">.</span><span class="n">string_types</span><span class="p">):</span>
<span class="k">return</span> <span class="n">import_module</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">urlconf_name</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">urlconf_name</span>
<span class="nd">@cached_property</span>
<span class="k">def</span> <span class="nf">url_patterns</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="c1"># urlconf_module might be a valid set of patterns, so we default to it</span>
<span class="n">patterns</span> <span class="o">=</span> <span class="nb">getattr</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">urlconf_module</span><span class="p">,</span> <span class="s2">"urlpatterns"</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">urlconf_module</span><span class="p">)</span>
<span class="k">try</span><span class="p">:</span>
<span class="nb">iter</span><span class="p">(</span><span class="n">patterns</span><span class="p">)</span>
<span class="k">except</span> <span class="ne">TypeError</span><span class="p">:</span>
<span class="n">msg</span> <span class="o">=</span> <span class="p">(</span>
<span class="s2">"The included URLconf '</span><span class="si">{name}</span><span class="s2">' does not appear to have any "</span>
<span class="s2">"patterns in it. If you see valid patterns in the file then "</span>
<span class="s2">"the issue is probably caused by a circular import."</span>
<span class="p">)</span>
<span class="k">raise</span> <span class="n">ImproperlyConfigured</span><span class="p">(</span><span class="n">msg</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">name</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">urlconf_name</span><span class="p">))</span>
<span class="k">return</span> <span class="n">patterns</span>
<span class="k">def</span> <span class="nf">resolve_error_handler</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">view_type</span><span class="p">):</span>
<span class="n">callback</span> <span class="o">=</span> <span class="nb">getattr</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">urlconf_module</span><span class="p">,</span> <span class="s1">'handler</span><span class="si">%s</span><span class="s1">'</span> <span class="o">%</span> <span class="n">view_type</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">callback</span><span class="p">:</span>
<span class="c1"># No handler specified in file; use lazy import, since</span>
<span class="c1"># django.conf.urls imports this file.</span>
<span class="kn">from</span> <span class="nn">django.conf</span> <span class="k">import</span> <span class="n">urls</span>
<span class="n">callback</span> <span class="o">=</span> <span class="nb">getattr</span><span class="p">(</span><span class="n">urls</span><span class="p">,</span> <span class="s1">'handler</span><span class="si">%s</span><span class="s1">'</span> <span class="o">%</span> <span class="n">view_type</span><span class="p">)</span>
<span class="k">return</span> <span class="n">get_callable</span><span class="p">(</span><span class="n">callback</span><span class="p">),</span> <span class="p">{}</span>
<span class="k">def</span> <span class="nf">reverse</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">lookup_view</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="bp">self</span><span class="o">.</span><span class="n">_reverse_with_prefix</span><span class="p">(</span><span class="n">lookup_view</span><span class="p">,</span> <span class="s1">''</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">_reverse_with_prefix</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">lookup_view</span><span class="p">,</span> <span class="n">_prefix</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">if</span> <span class="n">args</span> <span class="ow">and</span> <span class="n">kwargs</span><span class="p">:</span>
<span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s2">"Don't mix *args and **kwargs in call to reverse()!"</span><span class="p">)</span>
<span class="n">text_args</span> <span class="o">=</span> <span class="p">[</span><span class="n">force_text</span><span class="p">(</span><span class="n">v</span><span class="p">)</span> <span class="k">for</span> <span class="n">v</span> <span class="ow">in</span> <span class="n">args</span><span class="p">]</span>
<span class="n">text_kwargs</span> <span class="o">=</span> <span class="p">{</span><span class="n">k</span><span class="p">:</span> <span class="n">force_text</span><span class="p">(</span><span class="n">v</span><span class="p">)</span> <span class="k">for</span> <span class="p">(</span><span class="n">k</span><span class="p">,</span> <span class="n">v</span><span class="p">)</span> <span class="ow">in</span> <span class="n">kwargs</span><span class="o">.</span><span class="n">items</span><span class="p">()}</span>
<span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_populated</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_populate</span><span class="p">()</span>
<span class="n">possibilities</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">reverse_dict</span><span class="o">.</span><span class="n">getlist</span><span class="p">(</span><span class="n">lookup_view</span><span class="p">)</span>
<span class="k">for</span> <span class="n">possibility</span><span class="p">,</span> <span class="n">pattern</span><span class="p">,</span> <span class="n">defaults</span> <span class="ow">in</span> <span class="n">possibilities</span><span class="p">:</span>
<span class="k">for</span> <span class="n">result</span><span class="p">,</span> <span class="n">params</span> <span class="ow">in</span> <span class="n">possibility</span><span class="p">:</span>
<span class="k">if</span> <span class="n">args</span><span class="p">:</span>
<span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">args</span><span class="p">)</span> <span class="o">!=</span> <span class="nb">len</span><span class="p">(</span><span class="n">params</span><span class="p">):</span>
<span class="k">continue</span>
<span class="n">candidate_subs</span> <span class="o">=</span> <span class="nb">dict</span><span class="p">(</span><span class="nb">zip</span><span class="p">(</span><span class="n">params</span><span class="p">,</span> <span class="n">text_args</span><span class="p">))</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">if</span> <span class="p">(</span><span class="nb">set</span><span class="p">(</span><span class="n">kwargs</span><span class="o">.</span><span class="n">keys</span><span class="p">())</span> <span class="o">|</span> <span class="nb">set</span><span class="p">(</span><span class="n">defaults</span><span class="o">.</span><span class="n">keys</span><span class="p">())</span> <span class="o">!=</span> <span class="nb">set</span><span class="p">(</span><span class="n">params</span><span class="p">)</span> <span class="o">|</span>
<span class="nb">set</span><span class="p">(</span><span class="n">defaults</span><span class="o">.</span><span class="n">keys</span><span class="p">())):</span>
<span class="k">continue</span>
<span class="n">matches</span> <span class="o">=</span> <span class="kc">True</span>
<span class="k">for</span> <span class="n">k</span><span class="p">,</span> <span class="n">v</span> <span class="ow">in</span> <span class="n">defaults</span><span class="o">.</span><span class="n">items</span><span class="p">():</span>
<span class="k">if</span> <span class="n">kwargs</span><span class="o">.</span><span class="n">get</span><span class="p">(</span><span class="n">k</span><span class="p">,</span> <span class="n">v</span><span class="p">)</span> <span class="o">!=</span> <span class="n">v</span><span class="p">:</span>
<span class="n">matches</span> <span class="o">=</span> <span class="kc">False</span>
<span class="k">break</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">matches</span><span class="p">:</span>
<span class="k">continue</span>
<span class="n">candidate_subs</span> <span class="o">=</span> <span class="n">text_kwargs</span>
<span class="c1"># WSGI provides decoded URLs, without %xx escapes, and the URL</span>
<span class="c1"># resolver operates on such URLs. First substitute arguments</span>
<span class="c1"># without quoting to build a decoded URL and look for a match.</span>
<span class="c1"># Then, if we have a match, redo the substitution with quoted</span>
<span class="c1"># arguments in order to return a properly encoded URL.</span>
<span class="n">candidate_pat</span> <span class="o">=</span> <span class="n">_prefix</span><span class="o">.</span><span class="n">replace</span><span class="p">(</span><span class="s1">'%'</span><span class="p">,</span> <span class="s1">'</span><span class="si">%%</span><span class="s1">'</span><span class="p">)</span> <span class="o">+</span> <span class="n">result</span>
<span class="k">if</span> <span class="n">re</span><span class="o">.</span><span class="n">search</span><span class="p">(</span><span class="s1">'^</span><span class="si">%s%s</span><span class="s1">'</span> <span class="o">%</span> <span class="p">(</span><span class="n">re</span><span class="o">.</span><span class="n">escape</span><span class="p">(</span><span class="n">_prefix</span><span class="p">),</span> <span class="n">pattern</span><span class="p">),</span> <span class="n">candidate_pat</span> <span class="o">%</span> <span class="n">candidate_subs</span><span class="p">,</span> <span class="n">re</span><span class="o">.</span><span class="n">UNICODE</span><span class="p">):</span>
<span class="c1"># safe characters from `pchar` definition of RFC 3986</span>
<span class="n">url</span> <span class="o">=</span> <span class="n">urlquote</span><span class="p">(</span><span class="n">candidate_pat</span> <span class="o">%</span> <span class="n">candidate_subs</span><span class="p">,</span> <span class="n">safe</span><span class="o">=</span><span class="n">RFC3986_SUBDELIMS</span> <span class="o">+</span> <span class="nb">str</span><span class="p">(</span><span class="s1">'/~:@'</span><span class="p">))</span>
<span class="c1"># Don't allow construction of scheme relative urls.</span>
<span class="k">return</span> <span class="n">escape_leading_slashes</span><span class="p">(</span><span class="n">url</span><span class="p">)</span>
<span class="c1"># lookup_view can be URL name or callable, but callables are not</span>
<span class="c1"># friendly in error messages.</span>
<span class="n">m</span> <span class="o">=</span> <span class="nb">getattr</span><span class="p">(</span><span class="n">lookup_view</span><span class="p">,</span> <span class="s1">'__module__'</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span>
<span class="n">n</span> <span class="o">=</span> <span class="nb">getattr</span><span class="p">(</span><span class="n">lookup_view</span><span class="p">,</span> <span class="s1">'__name__'</span><span class="p">,</span> <span class="kc">None</span><span class="p">)</span>
<span class="k">if</span> <span class="n">m</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span> <span class="ow">and</span> <span class="n">n</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">lookup_view_s</span> <span class="o">=</span> <span class="s2">"</span><span class="si">%s</span><span class="s2">.</span><span class="si">%s</span><span class="s2">"</span> <span class="o">%</span> <span class="p">(</span><span class="n">m</span><span class="p">,</span> <span class="n">n</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">lookup_view_s</span> <span class="o">=</span> <span class="n">lookup_view</span>
<span class="n">patterns</span> <span class="o">=</span> <span class="p">[</span><span class="n">pattern</span> <span class="k">for</span> <span class="p">(</span><span class="n">possibility</span><span class="p">,</span> <span class="n">pattern</span><span class="p">,</span> <span class="n">defaults</span><span class="p">)</span> <span class="ow">in</span> <span class="n">possibilities</span><span class="p">]</span>
<span class="k">if</span> <span class="n">patterns</span><span class="p">:</span>
<span class="k">if</span> <span class="n">args</span><span class="p">:</span>
<span class="n">arg_msg</span> <span class="o">=</span> <span class="s2">"arguments '</span><span class="si">%s</span><span class="s2">'"</span> <span class="o">%</span> <span class="p">(</span><span class="n">args</span><span class="p">,)</span>
<span class="k">elif</span> <span class="n">kwargs</span><span class="p">:</span>
<span class="n">arg_msg</span> <span class="o">=</span> <span class="s2">"keyword arguments '</span><span class="si">%s</span><span class="s2">'"</span> <span class="o">%</span> <span class="p">(</span><span class="n">kwargs</span><span class="p">,)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">arg_msg</span> <span class="o">=</span> <span class="s2">"no arguments"</span>
<span class="n">msg</span> <span class="o">=</span> <span class="p">(</span>
<span class="s2">"Reverse for '</span><span class="si">%s</span><span class="s2">' with </span><span class="si">%s</span><span class="s2"> not found. </span><span class="si">%d</span><span class="s2"> pattern(s) tried: </span><span class="si">%s</span><span class="s2">"</span> <span class="o">%</span>
<span class="p">(</span><span class="n">lookup_view_s</span><span class="p">,</span> <span class="n">arg_msg</span><span class="p">,</span> <span class="nb">len</span><span class="p">(</span><span class="n">patterns</span><span class="p">),</span> <span class="n">patterns</span><span class="p">)</span>
<span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">msg</span> <span class="o">=</span> <span class="p">(</span>
<span class="s2">"Reverse for '</span><span class="si">%(view)s</span><span class="s2">' not found. '</span><span class="si">%(view)s</span><span class="s2">' is not "</span>
<span class="s2">"a valid view function or pattern name."</span> <span class="o">%</span> <span class="p">{</span><span class="s1">'view'</span><span class="p">:</span> <span class="n">lookup_view_s</span><span class="p">}</span>
<span class="p">)</span>
<span class="k">raise</span> <span class="n">NoReverseMatch</span><span class="p">(</span><span class="n">msg</span><span class="p">)</span>
<span class="k">class</span> <span class="nc">LocaleRegexURLResolver</span><span class="p">(</span><span class="n">RegexURLResolver</span><span class="p">):</span>
<span class="sd">"""</span>
<span class="sd"> A URL resolver that always matches the active language code as URL prefix.</span>
<span class="sd"> Rather than taking a regex argument, we just override the ``regex``</span>
<span class="sd"> function to always return the active language-code as regex.</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">urlconf_name</span><span class="p">,</span> <span class="n">default_kwargs</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">app_name</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">namespace</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span>
<span class="n">prefix_default_language</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span>
<span class="p">):</span>
<span class="nb">super</span><span class="p">(</span><span class="n">LocaleRegexURLResolver</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="fm">__init__</span><span class="p">(</span>
<span class="kc">None</span><span class="p">,</span> <span class="n">urlconf_name</span><span class="p">,</span> <span class="n">default_kwargs</span><span class="p">,</span> <span class="n">app_name</span><span class="p">,</span> <span class="n">namespace</span><span class="p">,</span>
<span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">prefix_default_language</span> <span class="o">=</span> <span class="n">prefix_default_language</span>
<span class="nd">@property</span>
<span class="k">def</span> <span class="nf">regex</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="n">language_code</span> <span class="o">=</span> <span class="n">get_language</span><span class="p">()</span> <span class="ow">or</span> <span class="n">settings</span><span class="o">.</span><span class="n">LANGUAGE_CODE</span>
<span class="k">if</span> <span class="n">language_code</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_regex_dict</span><span class="p">:</span>
<span class="k">if</span> <span class="n">language_code</span> <span class="o">==</span> <span class="n">settings</span><span class="o">.</span><span class="n">LANGUAGE_CODE</span> <span class="ow">and</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">prefix_default_language</span><span class="p">:</span>
<span class="n">regex_string</span> <span class="o">=</span> <span class="s1">''</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">regex_string</span> <span class="o">=</span> <span class="s1">'^</span><span class="si">%s</span><span class="s1">/'</span> <span class="o">%</span> <span class="n">language_code</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_regex_dict</span><span class="p">[</span><span class="n">language_code</span><span class="p">]</span> <span class="o">=</span> <span class="n">re</span><span class="o">.</span><span class="n">compile</span><span class="p">(</span><span class="n">regex_string</span><span class="p">,</span> <span class="n">re</span><span class="o">.</span><span class="n">UNICODE</span><span class="p">)</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">_regex_dict</span><span class="p">[</span><span class="n">language_code</span><span class="p">]</span>
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