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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>Instance Method 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="Cell Objects" href="cell.html" /> <link rel="prev" title="Function Objects" href="function.html" /> <link rel="shortcut icon" type="image/png" href="../_static/py.png" /> <link rel="canonical" href="https://docs.python.org/3/c-api/method.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="cell.html" title="Cell Objects" accesskey="N">next</a> |</li> <li class="right" > <a href="function.html" title="Function 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="instance-method-objects"> <span id="instancemethod-objects"></span><h1>Instance Method Objects<a class="headerlink" href="#instance-method-objects" title="Permalink to this headline">¶</a></h1> <p id="index-0">An instance method is a wrapper for a <a class="reference internal" href="structures.html#c.PyCFunction" title="PyCFunction"><code class="xref c c-data docutils literal notranslate"><span class="pre">PyCFunction</span></code></a> and the new way to bind a <a class="reference internal" href="structures.html#c.PyCFunction" title="PyCFunction"><code class="xref c c-data docutils literal notranslate"><span class="pre">PyCFunction</span></code></a> to a class object. It replaces the former call <code class="docutils literal notranslate"><span class="pre">PyMethod_New(func,</span> <span class="pre">NULL,</span> <span class="pre">class)</span></code>.</p> <dl class="var"> <dt id="c.PyInstanceMethod_Type"> <a class="reference internal" href="type.html#c.PyTypeObject" title="PyTypeObject">PyTypeObject</a> <code class="descname">PyInstanceMethod_Type</code><a class="headerlink" href="#c.PyInstanceMethod_Type" title="Permalink to this definition">¶</a></dt> <dd><p>This 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> represents the Python instance method type. It is not exposed to Python programs.</p> </dd></dl> <dl class="function"> <dt id="c.PyInstanceMethod_Check"> int <code class="descname">PyInstanceMethod_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.PyInstanceMethod_Check" title="Permalink to this definition">¶</a></dt> <dd><p>Return true if <em>o</em> is an instance method object (has type <a class="reference internal" href="#c.PyInstanceMethod_Type" title="PyInstanceMethod_Type"><code class="xref c c-data docutils literal notranslate"><span class="pre">PyInstanceMethod_Type</span></code></a>). The parameter must not be <em>NULL</em>.</p> </dd></dl> <dl class="function"> <dt id="c.PyInstanceMethod_New"> <a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a>* <code class="descname">PyInstanceMethod_New</code><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *func</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyInstanceMethod_New" title="Permalink to this definition">¶</a></dt> <dd><p>Return a new instance method object, with <em>func</em> being any callable object <em>func</em> is the function that will be called when the instance method is called.</p> </dd></dl> <dl class="function"> <dt id="c.PyInstanceMethod_Function"> <a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a>* <code class="descname">PyInstanceMethod_Function</code><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *im</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyInstanceMethod_Function" title="Permalink to this definition">¶</a></dt> <dd><p>Return the function object associated with the instance method <em>im</em>.</p> </dd></dl> <dl class="function"> <dt id="c.PyInstanceMethod_GET_FUNCTION"> <a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a>* <code class="descname">PyInstanceMethod_GET_FUNCTION</code><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *im</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyInstanceMethod_GET_FUNCTION" title="Permalink to this definition">¶</a></dt> <dd><p>Macro version of <a class="reference internal" href="#c.PyInstanceMethod_Function" title="PyInstanceMethod_Function"><code class="xref c c-func docutils literal notranslate"><span class="pre">PyInstanceMethod_Function()</span></code></a> which avoids error checking.</p> </dd></dl> </div> <div class="section" id="method-objects"> <span id="id1"></span><h1>Method Objects<a class="headerlink" href="#method-objects" title="Permalink to this headline">¶</a></h1> <p id="index-1">Methods are bound function objects. Methods are always bound to an instance of a user-defined class. Unbound methods (methods bound to a class object) are no longer available.</p> <dl class="var"> <dt id="c.PyMethod_Type"> <a class="reference internal" href="type.html#c.PyTypeObject" title="PyTypeObject">PyTypeObject</a> <code class="descname">PyMethod_Type</code><a class="headerlink" href="#c.PyMethod_Type" title="Permalink to this definition">¶</a></dt> <dd><p id="index-2">This 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> represents the Python method type. This is exposed to Python programs as <code class="docutils literal notranslate"><span class="pre">types.MethodType</span></code>.</p> </dd></dl> <dl class="function"> <dt id="c.PyMethod_Check"> int <code class="descname">PyMethod_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.PyMethod_Check" title="Permalink to this definition">¶</a></dt> <dd><p>Return true if <em>o</em> is a method object (has type <a class="reference internal" href="#c.PyMethod_Type" title="PyMethod_Type"><code class="xref c c-data docutils literal notranslate"><span class="pre">PyMethod_Type</span></code></a>). The parameter must not be <em>NULL</em>.</p> </dd></dl> <dl class="function"> <dt id="c.PyMethod_New"> <a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a>* <code class="descname">PyMethod_New</code><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *func</em>, <a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *self</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyMethod_New" title="Permalink to this definition">¶</a></dt> <dd><em class="refcount">Return value: New reference.</em><p>Return a new method object, with <em>func</em> being any callable object and <em>self</em> the instance the method should be bound. <em>func</em> is the function that will be called when the method is called. <em>self</em> must not be <em>NULL</em>.</p> </dd></dl> <dl class="function"> <dt id="c.PyMethod_Function"> <a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a>* <code class="descname">PyMethod_Function</code><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *meth</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyMethod_Function" title="Permalink to this definition">¶</a></dt> <dd><em class="refcount">Return value: Borrowed reference.</em><p>Return the function object associated with the method <em>meth</em>.</p> </dd></dl> <dl class="function"> <dt id="c.PyMethod_GET_FUNCTION"> <a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a>* <code class="descname">PyMethod_GET_FUNCTION</code><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *meth</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyMethod_GET_FUNCTION" title="Permalink to this definition">¶</a></dt> <dd><em class="refcount">Return value: Borrowed reference.</em><p>Macro version of <a class="reference internal" href="#c.PyMethod_Function" title="PyMethod_Function"><code class="xref c c-func docutils literal notranslate"><span class="pre">PyMethod_Function()</span></code></a> which avoids error checking.</p> </dd></dl> <dl class="function"> <dt id="c.PyMethod_Self"> <a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a>* <code class="descname">PyMethod_Self</code><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *meth</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyMethod_Self" title="Permalink to this definition">¶</a></dt> <dd><em class="refcount">Return value: Borrowed reference.</em><p>Return the instance associated with the method <em>meth</em>.</p> </dd></dl> <dl class="function"> <dt id="c.PyMethod_GET_SELF"> <a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a>* <code class="descname">PyMethod_GET_SELF</code><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *meth</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyMethod_GET_SELF" title="Permalink to this definition">¶</a></dt> <dd><em class="refcount">Return value: Borrowed reference.</em><p>Macro version of <a class="reference internal" href="#c.PyMethod_Self" title="PyMethod_Self"><code class="xref c c-func docutils literal notranslate"><span class="pre">PyMethod_Self()</span></code></a> which avoids error checking.</p> </dd></dl> <dl class="function"> <dt id="c.PyMethod_ClearFreeList"> int <code class="descname">PyMethod_ClearFreeList</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#c.PyMethod_ClearFreeList" title="Permalink to this definition">¶</a></dt> <dd><p>Clear the free list. Return the total number of freed items.</p> </dd></dl> </div> </div> </div> </div> <div class="sphinxsidebar" role="navigation" aria-label="main navigation"> <div class="sphinxsidebarwrapper"> <h3><a href="../contents.html">Table Of Contents</a></h3> <ul> <li><a class="reference internal" href="#">Instance Method Objects</a></li> <li><a class="reference internal" href="#method-objects">Method Objects</a></li> </ul> <h4>Previous topic</h4> <p class="topless"><a href="function.html" title="previous chapter">Function Objects</a></p> <h4>Next topic</h4> <p class="topless"><a href="cell.html" title="next chapter">Cell 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/method.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="cell.html" title="Cell Objects" >next</a> |</li> <li class="right" > <a href="function.html" title="Function 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>
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