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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="X-UA-Compatible" content="IE=Edge" /> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>Function Objects — Python 3.6.7 documentation</title> <link rel="stylesheet" href="../_static/pydoctheme.css" type="text/css" /> <link rel="stylesheet" href="../_static/pygments.css" type="text/css" /> <script type="text/javascript" id="documentation_options" data-url_root="../" src="../_static/documentation_options.js"></script> <script type="text/javascript" src="../_static/jquery.js"></script> <script type="text/javascript" src="../_static/underscore.js"></script> <script type="text/javascript" src="../_static/doctools.js"></script> <script type="text/javascript" src="../_static/sidebar.js"></script> <link rel="search" type="application/opensearchdescription+xml" title="Search within Python 3.6.7 documentation" href="../_static/opensearch.xml"/> <link rel="author" title="About these documents" href="../about.html" /> <link rel="index" title="Index" href="../genindex.html" /> <link rel="search" title="Search" href="../search.html" /> <link rel="copyright" title="Copyright" href="../copyright.html" /> <link rel="next" title="Instance Method Objects" href="method.html" /> <link rel="prev" title="Set Objects" href="set.html" /> <link rel="shortcut icon" type="image/png" href="../_static/py.png" /> <link rel="canonical" href="https://docs.python.org/3/c-api/function.html" /> <script type="text/javascript" src="../_static/copybutton.js"></script> </head><body> <div class="related" role="navigation" aria-label="related navigation"> <h3>Navigation</h3> <ul> <li class="right" style="margin-right: 10px"> <a href="../genindex.html" title="General Index" accesskey="I">index</a></li> <li class="right" > <a href="../py-modindex.html" title="Python Module Index" >modules</a> |</li> <li class="right" > <a href="method.html" title="Instance Method Objects" accesskey="N">next</a> |</li> <li class="right" > <a href="set.html" title="Set Objects" accesskey="P">previous</a> |</li> <li><img src="../_static/py.png" alt="" style="vertical-align: middle; margin-top: -1px"/></li> <li><a href="https://www.python.org/">Python</a> »</li> <li> <a href="../index.html">3.6.7 Documentation</a> » </li> <li class="nav-item nav-item-1"><a href="index.html" >Python/C API Reference Manual</a> »</li> <li class="nav-item nav-item-2"><a href="concrete.html" accesskey="U">Concrete Objects Layer</a> »</li> <li class="right"> <div class="inline-search" style="display: none" role="search"> <form class="inline-search" action="../search.html" method="get"> <input placeholder="Quick search" type="text" name="q" /> <input type="submit" value="Go" /> <input type="hidden" name="check_keywords" value="yes" /> <input type="hidden" name="area" value="default" /> </form> </div> <script type="text/javascript">$('.inline-search').show(0);</script> | </li> </ul> </div> <div class="document"> <div class="documentwrapper"> <div class="bodywrapper"> <div class="body" role="main"> <div class="section" id="function-objects"> <span id="id1"></span><h1>Function Objects<a class="headerlink" href="#function-objects" title="Permalink to this headline">ΒΆ</a></h1> <p id="index-0">There are a few functions specific to Python functions.</p> <dl class="type"> <dt id="c.PyFunctionObject"> <code class="descname">PyFunctionObject</code><a class="headerlink" href="#c.PyFunctionObject" title="Permalink to this definition">ΒΆ</a></dt> <dd><p>The C structure used for functions.</p> </dd></dl> <dl class="var"> <dt id="c.PyFunction_Type"> <a class="reference internal" href="type.html#c.PyTypeObject" title="PyTypeObject">PyTypeObject</a> <code class="descname">PyFunction_Type</code><a class="headerlink" href="#c.PyFunction_Type" title="Permalink to this definition">ΒΆ</a></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="function"> <dt id="c.PyFunction_Check"> int <code class="descname">PyFunction_Check</code><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *o</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyFunction_Check" title="Permalink to this definition">ΒΆ</a></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 <em>NULL</em>.</p> </dd></dl> <dl class="function"> <dt id="c.PyFunction_New"> <a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a>* <code class="descname">PyFunction_New</code><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *code</em>, <a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *globals</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyFunction_New" title="Permalink to this definition">ΒΆ</a></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 functionβs 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 <em>NULL</em>. <em>__qualname__</em> is set to the same value as the functionβs name.</p> </dd></dl> <dl class="function"> <dt id="c.PyFunction_NewWithQualName"> <a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a>* <code class="descname">PyFunction_NewWithQualName</code><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *code</em>, <a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *globals</em>, <a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *qualname</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyFunction_NewWithQualName" title="Permalink to this definition">ΒΆ</a></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 objectβs <code class="docutils literal notranslate"><span class="pre">__qualname__</span></code> attribute. <em>qualname</em> should be a unicode object or NULL; if NULL, 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">New in version 3.3.</span></p> </div> </dd></dl> <dl class="function"> <dt id="c.PyFunction_GetCode"> <a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a>* <code class="descname">PyFunction_GetCode</code><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *op</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyFunction_GetCode" title="Permalink to this definition">ΒΆ</a></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="function"> <dt id="c.PyFunction_GetGlobals"> <a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a>* <code class="descname">PyFunction_GetGlobals</code><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *op</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyFunction_GetGlobals" title="Permalink to this definition">ΒΆ</a></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="function"> <dt id="c.PyFunction_GetModule"> <a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a>* <code class="descname">PyFunction_GetModule</code><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *op</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyFunction_GetModule" title="Permalink to this definition">ΒΆ</a></dt> <dd><em class="refcount">Return value: Borrowed reference.</em><p>Return the <em>__module__</em> attribute of the function object <em>op</em>. 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="function"> <dt id="c.PyFunction_GetDefaults"> <a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a>* <code class="descname">PyFunction_GetDefaults</code><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *op</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyFunction_GetDefaults" title="Permalink to this definition">ΒΆ</a></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 <em>NULL</em>.</p> </dd></dl> <dl class="function"> <dt id="c.PyFunction_SetDefaults"> int <code class="descname">PyFunction_SetDefaults</code><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *op</em>, <a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *defaults</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyFunction_SetDefaults" title="Permalink to this definition">ΒΆ</a></dt> <dd><p>Set the argument default values for the function object <em>op</em>. <em>defaults</em> must be <em>Py_None</em> 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="function"> <dt id="c.PyFunction_GetClosure"> <a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a>* <code class="descname">PyFunction_GetClosure</code><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *op</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyFunction_GetClosure" title="Permalink to this definition">ΒΆ</a></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 <em>NULL</em> or a tuple of cell objects.</p> </dd></dl> <dl class="function"> <dt id="c.PyFunction_SetClosure"> int <code class="descname">PyFunction_SetClosure</code><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *op</em>, <a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *closure</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyFunction_SetClosure" title="Permalink to this definition">ΒΆ</a></dt> <dd><p>Set the closure associated with the function object <em>op</em>. <em>closure</em> must be <em>Py_None</em> 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="function"> <dt id="c.PyFunction_GetAnnotations"> <a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a> *<code class="descname">PyFunction_GetAnnotations</code><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *op</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyFunction_GetAnnotations" title="Permalink to this definition">ΒΆ</a></dt> <dd><p>Return the annotations of the function object <em>op</em>. This can be a mutable dictionary or <em>NULL</em>.</p> </dd></dl> <dl class="function"> <dt id="c.PyFunction_SetAnnotations"> int <code class="descname">PyFunction_SetAnnotations</code><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *op</em>, <a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *annotations</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyFunction_SetAnnotations" title="Permalink to this definition">ΒΆ</a></dt> <dd><p>Set the annotations for the function object <em>op</em>. <em>annotations</em> must be a dictionary or <em>Py_None</em>.</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> </div> </div> </div> </div> <div class="sphinxsidebar" role="navigation" aria-label="main navigation"> <div class="sphinxsidebarwrapper"> <h4>Previous topic</h4> <p class="topless"><a href="set.html" title="previous chapter">Set Objects</a></p> <h4>Next topic</h4> <p class="topless"><a href="method.html" title="next chapter">Instance Method Objects</a></p> <div role="note" aria-label="source link"> <h3>This Page</h3> <ul class="this-page-menu"> <li><a href="../bugs.html">Report a Bug</a></li> <li> <a href="https://github.com/python/cpython/blob/3.6/Doc/c-api/function.rst" rel="nofollow">Show Source </a> </li> </ul> </div> </div> </div> <div class="clearer"></div> </div> <div class="related" role="navigation" aria-label="related navigation"> <h3>Navigation</h3> <ul> <li class="right" style="margin-right: 10px"> <a href="../genindex.html" title="General Index" >index</a></li> <li class="right" > <a href="../py-modindex.html" title="Python Module Index" >modules</a> |</li> <li class="right" > <a href="method.html" title="Instance Method Objects" >next</a> |</li> <li class="right" > <a href="set.html" title="Set Objects" >previous</a> |</li> <li><img src="../_static/py.png" alt="" style="vertical-align: middle; margin-top: -1px"/></li> <li><a href="https://www.python.org/">Python</a> »</li> <li> <a href="../index.html">3.6.7 Documentation</a> » </li> <li class="nav-item nav-item-1"><a href="index.html" >Python/C API Reference Manual</a> »</li> <li class="nav-item nav-item-2"><a href="concrete.html" >Concrete Objects Layer</a> »</li> <li class="right"> <div class="inline-search" style="display: none" role="search"> <form class="inline-search" action="../search.html" method="get"> <input placeholder="Quick search" type="text" name="q" /> <input type="submit" value="Go" /> <input type="hidden" name="check_keywords" value="yes" /> <input type="hidden" name="area" value="default" /> </form> </div> <script type="text/javascript">$('.inline-search').show(0);</script> | </li> </ul> </div> <div class="footer"> © <a href="../copyright.html">Copyright</a> 2001-2023, Python Software Foundation. <br /> The Python Software Foundation is a non-profit corporation. <a href="https://www.python.org/psf/donations/">Please donate.</a> <br /> Last updated on Dec 18, 2023. <a href="../bugs.html">Found a bug</a>? <br /> Created using <a href="http://sphinx.pocoo.org/">Sphinx</a> 1.7.6. </div> </body> </html>