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<section id="function-objects">
<span id="id1"></span><h1>Function Objects<a class="headerlink" href="#function-objects" title="Permalink to this headline">¶</a></h1>
<p id="index-0">There are a few functions specific to Python functions.</p>
<dl class="c type">
<dt class="sig sig-object c" id="c.PyFunctionObject">
<span class="k"><span class="pre">type</span></span><span class="w"> </span><span class="sig-name descname"><span class="n"><span class="pre">PyFunctionObject</span></span></span><a class="headerlink" href="#c.PyFunctionObject" title="Permalink to this definition">¶</a><br /></dt>
<dd><p>The C structure used for functions.</p>
</dd></dl>
<dl class="c var">
<dt class="sig sig-object c" id="c.PyFunction_Type">
<a class="reference internal" href="type.html#c.PyTypeObject" title="PyTypeObject"><span class="n"><span class="pre">PyTypeObject</span></span></a><span class="w"> </span><span class="sig-name descname"><span class="n"><span class="pre">PyFunction_Type</span></span></span><a class="headerlink" href="#c.PyFunction_Type" title="Permalink to this definition">¶</a><br /></dt>
<dd><p id="index-1">This is an instance of <a class="reference internal" href="type.html#c.PyTypeObject" title="PyTypeObject"><code class="xref c c-type docutils literal notranslate"><span class="pre">PyTypeObject</span></code></a> and represents the Python function
type. It is exposed to Python programmers as <code class="docutils literal notranslate"><span class="pre">types.FunctionType</span></code>.</p>
</dd></dl>
<dl class="c function">
<dt class="sig sig-object c" id="c.PyFunction_Check">
<span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="sig-name descname"><span class="n"><span class="pre">PyFunction_Check</span></span></span><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject"><span class="n"><span class="pre">PyObject</span></span></a><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">o</span></span><span class="sig-paren">)</span><a class="headerlink" href="#c.PyFunction_Check" title="Permalink to this definition">¶</a><br /></dt>
<dd><p>Return true if <em>o</em> is a function object (has type <a class="reference internal" href="#c.PyFunction_Type" title="PyFunction_Type"><code class="xref c c-data docutils literal notranslate"><span class="pre">PyFunction_Type</span></code></a>).
The parameter must not be <code class="docutils literal notranslate"><span class="pre">NULL</span></code>. This function always succeeds.</p>
</dd></dl>
<dl class="c function">
<dt class="sig sig-object c" id="c.PyFunction_New">
<a class="reference internal" href="structures.html#c.PyObject" title="PyObject"><span class="n"><span class="pre">PyObject</span></span></a><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="sig-name descname"><span class="n"><span class="pre">PyFunction_New</span></span></span><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject"><span class="n"><span class="pre">PyObject</span></span></a><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">code</span></span>, <a class="reference internal" href="structures.html#c.PyObject" title="PyObject"><span class="n"><span class="pre">PyObject</span></span></a><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">globals</span></span><span class="sig-paren">)</span><a class="headerlink" href="#c.PyFunction_New" title="Permalink to this definition">¶</a><br /></dt>
<dd><em class="refcount">Return value: New reference.</em><p>Return a new function object associated with the code object <em>code</em>. <em>globals</em>
must be a dictionary with the global variables accessible to the function.</p>
<p>The function’s docstring and name are retrieved from the code object. <em>__module__</em>
is retrieved from <em>globals</em>. The argument defaults, annotations and closure are
set to <code class="docutils literal notranslate"><span class="pre">NULL</span></code>. <em>__qualname__</em> is set to the same value as the function’s name.</p>
</dd></dl>
<dl class="c function">
<dt class="sig sig-object c" id="c.PyFunction_NewWithQualName">
<a class="reference internal" href="structures.html#c.PyObject" title="PyObject"><span class="n"><span class="pre">PyObject</span></span></a><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="sig-name descname"><span class="n"><span class="pre">PyFunction_NewWithQualName</span></span></span><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject"><span class="n"><span class="pre">PyObject</span></span></a><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">code</span></span>, <a class="reference internal" href="structures.html#c.PyObject" title="PyObject"><span class="n"><span class="pre">PyObject</span></span></a><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">globals</span></span>, <a class="reference internal" href="structures.html#c.PyObject" title="PyObject"><span class="n"><span class="pre">PyObject</span></span></a><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">qualname</span></span><span class="sig-paren">)</span><a class="headerlink" href="#c.PyFunction_NewWithQualName" title="Permalink to this definition">¶</a><br /></dt>
<dd><em class="refcount">Return value: New reference.</em><p>As <a class="reference internal" href="#c.PyFunction_New" title="PyFunction_New"><code class="xref c c-func docutils literal notranslate"><span class="pre">PyFunction_New()</span></code></a>, but also allows setting the function object’s
<code class="docutils literal notranslate"><span class="pre">__qualname__</span></code> attribute. <em>qualname</em> should be a unicode object or <code class="docutils literal notranslate"><span class="pre">NULL</span></code>;
if <code class="docutils literal notranslate"><span class="pre">NULL</span></code>, the <code class="docutils literal notranslate"><span class="pre">__qualname__</span></code> attribute is set to the same value as its
<code class="docutils literal notranslate"><span class="pre">__name__</span></code> attribute.</p>
<div class="versionadded">
<p><span class="versionmodified added">New in version 3.3.</span></p>
</div>
</dd></dl>
<dl class="c function">
<dt class="sig sig-object c" id="c.PyFunction_GetCode">
<a class="reference internal" href="structures.html#c.PyObject" title="PyObject"><span class="n"><span class="pre">PyObject</span></span></a><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="sig-name descname"><span class="n"><span class="pre">PyFunction_GetCode</span></span></span><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject"><span class="n"><span class="pre">PyObject</span></span></a><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">op</span></span><span class="sig-paren">)</span><a class="headerlink" href="#c.PyFunction_GetCode" title="Permalink to this definition">¶</a><br /></dt>
<dd><em class="refcount">Return value: Borrowed reference.</em><p>Return the code object associated with the function object <em>op</em>.</p>
</dd></dl>
<dl class="c function">
<dt class="sig sig-object c" id="c.PyFunction_GetGlobals">
<a class="reference internal" href="structures.html#c.PyObject" title="PyObject"><span class="n"><span class="pre">PyObject</span></span></a><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="sig-name descname"><span class="n"><span class="pre">PyFunction_GetGlobals</span></span></span><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject"><span class="n"><span class="pre">PyObject</span></span></a><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">op</span></span><span class="sig-paren">)</span><a class="headerlink" href="#c.PyFunction_GetGlobals" title="Permalink to this definition">¶</a><br /></dt>
<dd><em class="refcount">Return value: Borrowed reference.</em><p>Return the globals dictionary associated with the function object <em>op</em>.</p>
</dd></dl>
<dl class="c function">
<dt class="sig sig-object c" id="c.PyFunction_GetModule">
<a class="reference internal" href="structures.html#c.PyObject" title="PyObject"><span class="n"><span class="pre">PyObject</span></span></a><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="sig-name descname"><span class="n"><span class="pre">PyFunction_GetModule</span></span></span><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject"><span class="n"><span class="pre">PyObject</span></span></a><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">op</span></span><span class="sig-paren">)</span><a class="headerlink" href="#c.PyFunction_GetModule" title="Permalink to this definition">¶</a><br /></dt>
<dd><em class="refcount">Return value: Borrowed reference.</em><p>Return a <a class="reference internal" href="../glossary.html#term-borrowed-reference"><span class="xref std std-term">borrowed reference</span></a> to the <em>__module__</em> attribute of the
function object <em>op</em>. It can be <em>NULL</em>.</p>
<p>This is normally a string containing the module name, but can be set to any
other object by Python code.</p>
</dd></dl>
<dl class="c function">
<dt class="sig sig-object c" id="c.PyFunction_GetDefaults">
<a class="reference internal" href="structures.html#c.PyObject" title="PyObject"><span class="n"><span class="pre">PyObject</span></span></a><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="sig-name descname"><span class="n"><span class="pre">PyFunction_GetDefaults</span></span></span><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject"><span class="n"><span class="pre">PyObject</span></span></a><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">op</span></span><span class="sig-paren">)</span><a class="headerlink" href="#c.PyFunction_GetDefaults" title="Permalink to this definition">¶</a><br /></dt>
<dd><em class="refcount">Return value: Borrowed reference.</em><p>Return the argument default values of the function object <em>op</em>. This can be a
tuple of arguments or <code class="docutils literal notranslate"><span class="pre">NULL</span></code>.</p>
</dd></dl>
<dl class="c function">
<dt class="sig sig-object c" id="c.PyFunction_SetDefaults">
<span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="sig-name descname"><span class="n"><span class="pre">PyFunction_SetDefaults</span></span></span><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject"><span class="n"><span class="pre">PyObject</span></span></a><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">op</span></span>, <a class="reference internal" href="structures.html#c.PyObject" title="PyObject"><span class="n"><span class="pre">PyObject</span></span></a><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">defaults</span></span><span class="sig-paren">)</span><a class="headerlink" href="#c.PyFunction_SetDefaults" title="Permalink to this definition">¶</a><br /></dt>
<dd><p>Set the argument default values for the function object <em>op</em>. <em>defaults</em> must be
<code class="docutils literal notranslate"><span class="pre">Py_None</span></code> or a tuple.</p>
<p>Raises <a class="reference internal" href="../library/exceptions.html#SystemError" title="SystemError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">SystemError</span></code></a> and returns <code class="docutils literal notranslate"><span class="pre">-1</span></code> on failure.</p>
</dd></dl>
<dl class="c function">
<dt class="sig sig-object c" id="c.PyFunction_GetClosure">
<a class="reference internal" href="structures.html#c.PyObject" title="PyObject"><span class="n"><span class="pre">PyObject</span></span></a><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="sig-name descname"><span class="n"><span class="pre">PyFunction_GetClosure</span></span></span><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject"><span class="n"><span class="pre">PyObject</span></span></a><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">op</span></span><span class="sig-paren">)</span><a class="headerlink" href="#c.PyFunction_GetClosure" title="Permalink to this definition">¶</a><br /></dt>
<dd><em class="refcount">Return value: Borrowed reference.</em><p>Return the closure associated with the function object <em>op</em>. This can be <code class="docutils literal notranslate"><span class="pre">NULL</span></code>
or a tuple of cell objects.</p>
</dd></dl>
<dl class="c function">
<dt class="sig sig-object c" id="c.PyFunction_SetClosure">
<span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="sig-name descname"><span class="n"><span class="pre">PyFunction_SetClosure</span></span></span><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject"><span class="n"><span class="pre">PyObject</span></span></a><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">op</span></span>, <a class="reference internal" href="structures.html#c.PyObject" title="PyObject"><span class="n"><span class="pre">PyObject</span></span></a><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">closure</span></span><span class="sig-paren">)</span><a class="headerlink" href="#c.PyFunction_SetClosure" title="Permalink to this definition">¶</a><br /></dt>
<dd><p>Set the closure associated with the function object <em>op</em>. <em>closure</em> must be
<code class="docutils literal notranslate"><span class="pre">Py_None</span></code> or a tuple of cell objects.</p>
<p>Raises <a class="reference internal" href="../library/exceptions.html#SystemError" title="SystemError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">SystemError</span></code></a> and returns <code class="docutils literal notranslate"><span class="pre">-1</span></code> on failure.</p>
</dd></dl>
<dl class="c function">
<dt class="sig sig-object c" id="c.PyFunction_GetAnnotations">
<a class="reference internal" href="structures.html#c.PyObject" title="PyObject"><span class="n"><span class="pre">PyObject</span></span></a><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="sig-name descname"><span class="n"><span class="pre">PyFunction_GetAnnotations</span></span></span><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject"><span class="n"><span class="pre">PyObject</span></span></a><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">op</span></span><span class="sig-paren">)</span><a class="headerlink" href="#c.PyFunction_GetAnnotations" title="Permalink to this definition">¶</a><br /></dt>
<dd><em class="refcount">Return value: Borrowed reference.</em><p>Return the annotations of the function object <em>op</em>. This can be a
mutable dictionary or <code class="docutils literal notranslate"><span class="pre">NULL</span></code>.</p>
</dd></dl>
<dl class="c function">
<dt class="sig sig-object c" id="c.PyFunction_SetAnnotations">
<span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="sig-name descname"><span class="n"><span class="pre">PyFunction_SetAnnotations</span></span></span><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject"><span class="n"><span class="pre">PyObject</span></span></a><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">op</span></span>, <a class="reference internal" href="structures.html#c.PyObject" title="PyObject"><span class="n"><span class="pre">PyObject</span></span></a><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">annotations</span></span><span class="sig-paren">)</span><a class="headerlink" href="#c.PyFunction_SetAnnotations" title="Permalink to this definition">¶</a><br /></dt>
<dd><p>Set the annotations for the function object <em>op</em>. <em>annotations</em>
must be a dictionary or <code class="docutils literal notranslate"><span class="pre">Py_None</span></code>.</p>
<p>Raises <a class="reference internal" href="../library/exceptions.html#SystemError" title="SystemError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">SystemError</span></code></a> and returns <code class="docutils literal notranslate"><span class="pre">-1</span></code> on failure.</p>
</dd></dl>
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