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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="Content-Type" content="text/html; charset=utf-8" /> <title>Set Objects — Python 2.7.5 documentation</title> <link rel="stylesheet" href="../_static/default.css" type="text/css" /> <link rel="stylesheet" href="../_static/pygments.css" type="text/css" /> <script type="text/javascript"> var DOCUMENTATION_OPTIONS = { URL_ROOT: '../', VERSION: '2.7.5', COLLAPSE_INDEX: false, FILE_SUFFIX: '.html', HAS_SOURCE: true }; </script> <script type="text/javascript" src="../_static/jquery.js"></script> <script type="text/javascript" src="../_static/underscore.js"></script> <script type="text/javascript" src="../_static/doctools.js"></script> <script type="text/javascript" src="../_static/sidebar.js"></script> <link rel="search" type="application/opensearchdescription+xml" title="Search within Python 2.7.5 documentation" href="../_static/opensearch.xml"/> <link rel="author" title="About these documents" href="../about.html" /> <link rel="copyright" title="Copyright" href="../copyright.html" /> <link rel="top" title="Python 2.7.5 documentation" href="../index.html" /> <link rel="up" title="Concrete Objects Layer" href="concrete.html" /> <link rel="next" title="Code Objects" href="code.html" /> <link rel="prev" title="DateTime Objects" href="datetime.html" /> <link rel="shortcut icon" type="image/png" href="../_static/py.png" /> <script type="text/javascript" src="../_static/copybutton.js"></script> </head> <body> <div class="related"> <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="code.html" title="Code Objects" accesskey="N">next</a> |</li> <li class="right" > <a href="datetime.html" title="DateTime Objects" accesskey="P">previous</a> |</li> <li><img src="../_static/py.png" alt="" style="vertical-align: middle; margin-top: -1px"/></li> <li><a href="http://www.python.org/">Python</a> »</li> <li> <a href="../index.html">Python 2.7.5 documentation</a> » </li> <li><a href="index.html" >Python/C API Reference Manual</a> »</li> <li><a href="concrete.html" accesskey="U">Concrete Objects Layer</a> »</li> </ul> </div> <div class="document"> <div class="documentwrapper"> <div class="bodywrapper"> <div class="body"> <div class="section" id="set-objects"> <span id="setobjects"></span><h1>Set Objects<a class="headerlink" href="#set-objects" title="Permalink to this headline">¶</a></h1> <p class="versionadded" id="index-0"> <span class="versionmodified">New in version 2.5.</span></p> <p>This section details the public API for <a class="reference internal" href="../library/stdtypes.html#set" title="set"><tt class="xref py py-class docutils literal"><span class="pre">set</span></tt></a> and <a class="reference internal" href="../library/stdtypes.html#frozenset" title="frozenset"><tt class="xref py py-class docutils literal"><span class="pre">frozenset</span></tt></a> objects. Any functionality not listed below is best accessed using the either the abstract object protocol (including <a class="reference internal" href="object.html#PyObject_CallMethod" title="PyObject_CallMethod"><tt class="xref c c-func docutils literal"><span class="pre">PyObject_CallMethod()</span></tt></a>, <a class="reference internal" href="object.html#PyObject_RichCompareBool" title="PyObject_RichCompareBool"><tt class="xref c c-func docutils literal"><span class="pre">PyObject_RichCompareBool()</span></tt></a>, <a class="reference internal" href="object.html#PyObject_Hash" title="PyObject_Hash"><tt class="xref c c-func docutils literal"><span class="pre">PyObject_Hash()</span></tt></a>, <a class="reference internal" href="object.html#PyObject_Repr" title="PyObject_Repr"><tt class="xref c c-func docutils literal"><span class="pre">PyObject_Repr()</span></tt></a>, <a class="reference internal" href="object.html#PyObject_IsTrue" title="PyObject_IsTrue"><tt class="xref c c-func docutils literal"><span class="pre">PyObject_IsTrue()</span></tt></a>, <a class="reference internal" href="object.html#PyObject_Print" title="PyObject_Print"><tt class="xref c c-func docutils literal"><span class="pre">PyObject_Print()</span></tt></a>, and <a class="reference internal" href="object.html#PyObject_GetIter" title="PyObject_GetIter"><tt class="xref c c-func docutils literal"><span class="pre">PyObject_GetIter()</span></tt></a>) or the abstract number protocol (including <a class="reference internal" href="number.html#PyNumber_And" title="PyNumber_And"><tt class="xref c c-func docutils literal"><span class="pre">PyNumber_And()</span></tt></a>, <a class="reference internal" href="number.html#PyNumber_Subtract" title="PyNumber_Subtract"><tt class="xref c c-func docutils literal"><span class="pre">PyNumber_Subtract()</span></tt></a>, <a class="reference internal" href="number.html#PyNumber_Or" title="PyNumber_Or"><tt class="xref c c-func docutils literal"><span class="pre">PyNumber_Or()</span></tt></a>, <a class="reference internal" href="number.html#PyNumber_Xor" title="PyNumber_Xor"><tt class="xref c c-func docutils literal"><span class="pre">PyNumber_Xor()</span></tt></a>, <a class="reference internal" href="number.html#PyNumber_InPlaceAnd" title="PyNumber_InPlaceAnd"><tt class="xref c c-func docutils literal"><span class="pre">PyNumber_InPlaceAnd()</span></tt></a>, <a class="reference internal" href="number.html#PyNumber_InPlaceSubtract" title="PyNumber_InPlaceSubtract"><tt class="xref c c-func docutils literal"><span class="pre">PyNumber_InPlaceSubtract()</span></tt></a>, <a class="reference internal" href="number.html#PyNumber_InPlaceOr" title="PyNumber_InPlaceOr"><tt class="xref c c-func docutils literal"><span class="pre">PyNumber_InPlaceOr()</span></tt></a>, and <a class="reference internal" href="number.html#PyNumber_InPlaceXor" title="PyNumber_InPlaceXor"><tt class="xref c c-func docutils literal"><span class="pre">PyNumber_InPlaceXor()</span></tt></a>).</p> <dl class="type"> <dt id="PySetObject"> <tt class="descname">PySetObject</tt><a class="headerlink" href="#PySetObject" title="Permalink to this definition">¶</a></dt> <dd><p>This subtype of <a class="reference internal" href="structures.html#PyObject" title="PyObject"><tt class="xref c c-type docutils literal"><span class="pre">PyObject</span></tt></a> is used to hold the internal data for both <a class="reference internal" href="../library/stdtypes.html#set" title="set"><tt class="xref py py-class docutils literal"><span class="pre">set</span></tt></a> and <a class="reference internal" href="../library/stdtypes.html#frozenset" title="frozenset"><tt class="xref py py-class docutils literal"><span class="pre">frozenset</span></tt></a> objects. It is like a <a class="reference internal" href="dict.html#PyDictObject" title="PyDictObject"><tt class="xref c c-type docutils literal"><span class="pre">PyDictObject</span></tt></a> in that it is a fixed size for small sets (much like tuple storage) and will point to a separate, variable sized block of memory for medium and large sized sets (much like list storage). None of the fields of this structure should be considered public and are subject to change. All access should be done through the documented API rather than by manipulating the values in the structure.</p> </dd></dl> <dl class="var"> <dt id="PySet_Type"> <a class="reference internal" href="type.html#PyTypeObject" title="PyTypeObject">PyTypeObject</a> <tt class="descname">PySet_Type</tt><a class="headerlink" href="#PySet_Type" title="Permalink to this definition">¶</a></dt> <dd><p>This is an instance of <a class="reference internal" href="type.html#PyTypeObject" title="PyTypeObject"><tt class="xref c c-type docutils literal"><span class="pre">PyTypeObject</span></tt></a> representing the Python <a class="reference internal" href="../library/stdtypes.html#set" title="set"><tt class="xref py py-class docutils literal"><span class="pre">set</span></tt></a> type.</p> </dd></dl> <dl class="var"> <dt id="PyFrozenSet_Type"> <a class="reference internal" href="type.html#PyTypeObject" title="PyTypeObject">PyTypeObject</a> <tt class="descname">PyFrozenSet_Type</tt><a class="headerlink" href="#PyFrozenSet_Type" title="Permalink to this definition">¶</a></dt> <dd><p>This is an instance of <a class="reference internal" href="type.html#PyTypeObject" title="PyTypeObject"><tt class="xref c c-type docutils literal"><span class="pre">PyTypeObject</span></tt></a> representing the Python <a class="reference internal" href="../library/stdtypes.html#frozenset" title="frozenset"><tt class="xref py py-class docutils literal"><span class="pre">frozenset</span></tt></a> type.</p> </dd></dl> <p>The following type check macros work on pointers to any Python object. Likewise, the constructor functions work with any iterable Python object.</p> <dl class="function"> <dt id="PySet_Check"> int <tt class="descname">PySet_Check</tt><big>(</big><a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a><em> *p</em><big>)</big><a class="headerlink" href="#PySet_Check" title="Permalink to this definition">¶</a></dt> <dd><p>Return true if <em>p</em> is a <a class="reference internal" href="../library/stdtypes.html#set" title="set"><tt class="xref py py-class docutils literal"><span class="pre">set</span></tt></a> object or an instance of a subtype.</p> <p class="versionadded"> <span class="versionmodified">New in version 2.6.</span></p> </dd></dl> <dl class="function"> <dt id="PyFrozenSet_Check"> int <tt class="descname">PyFrozenSet_Check</tt><big>(</big><a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a><em> *p</em><big>)</big><a class="headerlink" href="#PyFrozenSet_Check" title="Permalink to this definition">¶</a></dt> <dd><p>Return true if <em>p</em> is a <a class="reference internal" href="../library/stdtypes.html#frozenset" title="frozenset"><tt class="xref py py-class docutils literal"><span class="pre">frozenset</span></tt></a> object or an instance of a subtype.</p> <p class="versionadded"> <span class="versionmodified">New in version 2.6.</span></p> </dd></dl> <dl class="function"> <dt id="PyAnySet_Check"> int <tt class="descname">PyAnySet_Check</tt><big>(</big><a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a><em> *p</em><big>)</big><a class="headerlink" href="#PyAnySet_Check" title="Permalink to this definition">¶</a></dt> <dd><p>Return true if <em>p</em> is a <a class="reference internal" href="../library/stdtypes.html#set" title="set"><tt class="xref py py-class docutils literal"><span class="pre">set</span></tt></a> object, a <a class="reference internal" href="../library/stdtypes.html#frozenset" title="frozenset"><tt class="xref py py-class docutils literal"><span class="pre">frozenset</span></tt></a> object, or an instance of a subtype.</p> </dd></dl> <dl class="function"> <dt id="PyAnySet_CheckExact"> int <tt class="descname">PyAnySet_CheckExact</tt><big>(</big><a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a><em> *p</em><big>)</big><a class="headerlink" href="#PyAnySet_CheckExact" title="Permalink to this definition">¶</a></dt> <dd><p>Return true if <em>p</em> is a <a class="reference internal" href="../library/stdtypes.html#set" title="set"><tt class="xref py py-class docutils literal"><span class="pre">set</span></tt></a> object or a <a class="reference internal" href="../library/stdtypes.html#frozenset" title="frozenset"><tt class="xref py py-class docutils literal"><span class="pre">frozenset</span></tt></a> object but not an instance of a subtype.</p> </dd></dl> <dl class="function"> <dt id="PyFrozenSet_CheckExact"> int <tt class="descname">PyFrozenSet_CheckExact</tt><big>(</big><a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a><em> *p</em><big>)</big><a class="headerlink" href="#PyFrozenSet_CheckExact" title="Permalink to this definition">¶</a></dt> <dd><p>Return true if <em>p</em> is a <a class="reference internal" href="../library/stdtypes.html#frozenset" title="frozenset"><tt class="xref py py-class docutils literal"><span class="pre">frozenset</span></tt></a> object but not an instance of a subtype.</p> </dd></dl> <dl class="function"> <dt id="PySet_New"> <a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a>* <tt class="descname">PySet_New</tt><big>(</big><a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a><em> *iterable</em><big>)</big><a class="headerlink" href="#PySet_New" title="Permalink to this definition">¶</a></dt> <dd><em class="refcount">Return value: New reference.</em><p>Return a new <a class="reference internal" href="../library/stdtypes.html#set" title="set"><tt class="xref py py-class docutils literal"><span class="pre">set</span></tt></a> containing objects returned by the <em>iterable</em>. The <em>iterable</em> may be <em>NULL</em> to create a new empty set. Return the new set on success or <em>NULL</em> on failure. Raise <a class="reference internal" href="../library/exceptions.html#exceptions.TypeError" title="exceptions.TypeError"><tt class="xref py py-exc docutils literal"><span class="pre">TypeError</span></tt></a> if <em>iterable</em> is not actually iterable. The constructor is also useful for copying a set (<tt class="docutils literal"><span class="pre">c=set(s)</span></tt>).</p> </dd></dl> <dl class="function"> <dt id="PyFrozenSet_New"> <a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a>* <tt class="descname">PyFrozenSet_New</tt><big>(</big><a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a><em> *iterable</em><big>)</big><a class="headerlink" href="#PyFrozenSet_New" title="Permalink to this definition">¶</a></dt> <dd><em class="refcount">Return value: New reference.</em><p>Return a new <a class="reference internal" href="../library/stdtypes.html#frozenset" title="frozenset"><tt class="xref py py-class docutils literal"><span class="pre">frozenset</span></tt></a> containing objects returned by the <em>iterable</em>. The <em>iterable</em> may be <em>NULL</em> to create a new empty frozenset. Return the new set on success or <em>NULL</em> on failure. Raise <a class="reference internal" href="../library/exceptions.html#exceptions.TypeError" title="exceptions.TypeError"><tt class="xref py py-exc docutils literal"><span class="pre">TypeError</span></tt></a> if <em>iterable</em> is not actually iterable.</p> <p class="versionchanged"> <span class="versionmodified">Changed in version 2.6: </span>Now guaranteed to return a brand-new <a class="reference internal" href="../library/stdtypes.html#frozenset" title="frozenset"><tt class="xref py py-class docutils literal"><span class="pre">frozenset</span></tt></a>. Formerly, frozensets of zero-length were a singleton. This got in the way of building-up new frozensets with <tt class="xref py py-meth docutils literal"><span class="pre">PySet_Add()</span></tt>.</p> </dd></dl> <p>The following functions and macros are available for instances of <a class="reference internal" href="../library/stdtypes.html#set" title="set"><tt class="xref py py-class docutils literal"><span class="pre">set</span></tt></a> or <a class="reference internal" href="../library/stdtypes.html#frozenset" title="frozenset"><tt class="xref py py-class docutils literal"><span class="pre">frozenset</span></tt></a> or instances of their subtypes.</p> <dl class="function"> <dt id="PySet_Size"> Py_ssize_t <tt class="descname">PySet_Size</tt><big>(</big><a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a><em> *anyset</em><big>)</big><a class="headerlink" href="#PySet_Size" title="Permalink to this definition">¶</a></dt> <dd><p id="index-1">Return the length of a <a class="reference internal" href="../library/stdtypes.html#set" title="set"><tt class="xref py py-class docutils literal"><span class="pre">set</span></tt></a> or <a class="reference internal" href="../library/stdtypes.html#frozenset" title="frozenset"><tt class="xref py py-class docutils literal"><span class="pre">frozenset</span></tt></a> object. Equivalent to <tt class="docutils literal"><span class="pre">len(anyset)</span></tt>. Raises a <tt class="xref py py-exc docutils literal"><span class="pre">PyExc_SystemError</span></tt> if <em>anyset</em> is not a <a class="reference internal" href="../library/stdtypes.html#set" title="set"><tt class="xref py py-class docutils literal"><span class="pre">set</span></tt></a>, <a class="reference internal" href="../library/stdtypes.html#frozenset" title="frozenset"><tt class="xref py py-class docutils literal"><span class="pre">frozenset</span></tt></a>, or an instance of a subtype.</p> <p class="versionchanged"> <span class="versionmodified">Changed in version 2.5: </span>This function returned an <tt class="xref c c-type docutils literal"><span class="pre">int</span></tt>. This might require changes in your code for properly supporting 64-bit systems.</p> </dd></dl> <dl class="function"> <dt id="PySet_GET_SIZE"> Py_ssize_t <tt class="descname">PySet_GET_SIZE</tt><big>(</big><a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a><em> *anyset</em><big>)</big><a class="headerlink" href="#PySet_GET_SIZE" title="Permalink to this definition">¶</a></dt> <dd><p>Macro form of <a class="reference internal" href="#PySet_Size" title="PySet_Size"><tt class="xref c c-func docutils literal"><span class="pre">PySet_Size()</span></tt></a> without error checking.</p> </dd></dl> <dl class="function"> <dt id="PySet_Contains"> int <tt class="descname">PySet_Contains</tt><big>(</big><a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a><em> *anyset</em>, <a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a><em> *key</em><big>)</big><a class="headerlink" href="#PySet_Contains" title="Permalink to this definition">¶</a></dt> <dd><p>Return 1 if found, 0 if not found, and -1 if an error is encountered. Unlike the Python <a class="reference internal" href="../reference/datamodel.html#object.__contains__" title="object.__contains__"><tt class="xref py py-meth docutils literal"><span class="pre">__contains__()</span></tt></a> method, this function does not automatically convert unhashable sets into temporary frozensets. Raise a <a class="reference internal" href="../library/exceptions.html#exceptions.TypeError" title="exceptions.TypeError"><tt class="xref py py-exc docutils literal"><span class="pre">TypeError</span></tt></a> if the <em>key</em> is unhashable. Raise <tt class="xref py py-exc docutils literal"><span class="pre">PyExc_SystemError</span></tt> if <em>anyset</em> is not a <a class="reference internal" href="../library/stdtypes.html#set" title="set"><tt class="xref py py-class docutils literal"><span class="pre">set</span></tt></a>, <a class="reference internal" href="../library/stdtypes.html#frozenset" title="frozenset"><tt class="xref py py-class docutils literal"><span class="pre">frozenset</span></tt></a>, or an instance of a subtype.</p> </dd></dl> <dl class="function"> <dt id="PySet_Add"> int <tt class="descname">PySet_Add</tt><big>(</big><a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a><em> *set</em>, <a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a><em> *key</em><big>)</big><a class="headerlink" href="#PySet_Add" title="Permalink to this definition">¶</a></dt> <dd><p>Add <em>key</em> to a <a class="reference internal" href="../library/stdtypes.html#set" title="set"><tt class="xref py py-class docutils literal"><span class="pre">set</span></tt></a> instance. Does not apply to <a class="reference internal" href="../library/stdtypes.html#frozenset" title="frozenset"><tt class="xref py py-class docutils literal"><span class="pre">frozenset</span></tt></a> instances. Return 0 on success or -1 on failure. Raise a <a class="reference internal" href="../library/exceptions.html#exceptions.TypeError" title="exceptions.TypeError"><tt class="xref py py-exc docutils literal"><span class="pre">TypeError</span></tt></a> if the <em>key</em> is unhashable. Raise a <a class="reference internal" href="../library/exceptions.html#exceptions.MemoryError" title="exceptions.MemoryError"><tt class="xref py py-exc docutils literal"><span class="pre">MemoryError</span></tt></a> if there is no room to grow. Raise a <a class="reference internal" href="../library/exceptions.html#exceptions.SystemError" title="exceptions.SystemError"><tt class="xref py py-exc docutils literal"><span class="pre">SystemError</span></tt></a> if <em>set</em> is an not an instance of <a class="reference internal" href="../library/stdtypes.html#set" title="set"><tt class="xref py py-class docutils literal"><span class="pre">set</span></tt></a> or its subtype.</p> <p class="versionchanged"> <span class="versionmodified">Changed in version 2.6: </span>Now works with instances of <a class="reference internal" href="../library/stdtypes.html#frozenset" title="frozenset"><tt class="xref py py-class docutils literal"><span class="pre">frozenset</span></tt></a> or its subtypes. Like <a class="reference internal" href="tuple.html#PyTuple_SetItem" title="PyTuple_SetItem"><tt class="xref c c-func docutils literal"><span class="pre">PyTuple_SetItem()</span></tt></a> in that it can be used to fill-in the values of brand new frozensets before they are exposed to other code.</p> </dd></dl> <p>The following functions are available for instances of <a class="reference internal" href="../library/stdtypes.html#set" title="set"><tt class="xref py py-class docutils literal"><span class="pre">set</span></tt></a> or its subtypes but not for instances of <a class="reference internal" href="../library/stdtypes.html#frozenset" title="frozenset"><tt class="xref py py-class docutils literal"><span class="pre">frozenset</span></tt></a> or its subtypes.</p> <dl class="function"> <dt id="PySet_Discard"> int <tt class="descname">PySet_Discard</tt><big>(</big><a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a><em> *set</em>, <a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a><em> *key</em><big>)</big><a class="headerlink" href="#PySet_Discard" title="Permalink to this definition">¶</a></dt> <dd><p>Return 1 if found and removed, 0 if not found (no action taken), and -1 if an error is encountered. Does not raise <a class="reference internal" href="../library/exceptions.html#exceptions.KeyError" title="exceptions.KeyError"><tt class="xref py py-exc docutils literal"><span class="pre">KeyError</span></tt></a> for missing keys. Raise a <a class="reference internal" href="../library/exceptions.html#exceptions.TypeError" title="exceptions.TypeError"><tt class="xref py py-exc docutils literal"><span class="pre">TypeError</span></tt></a> if the <em>key</em> is unhashable. Unlike the Python <tt class="xref py py-meth docutils literal"><span class="pre">discard()</span></tt> method, this function does not automatically convert unhashable sets into temporary frozensets. Raise <tt class="xref py py-exc docutils literal"><span class="pre">PyExc_SystemError</span></tt> if <em>set</em> is an not an instance of <a class="reference internal" href="../library/stdtypes.html#set" title="set"><tt class="xref py py-class docutils literal"><span class="pre">set</span></tt></a> or its subtype.</p> </dd></dl> <dl class="function"> <dt id="PySet_Pop"> <a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a>* <tt class="descname">PySet_Pop</tt><big>(</big><a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a><em> *set</em><big>)</big><a class="headerlink" href="#PySet_Pop" title="Permalink to this definition">¶</a></dt> <dd><em class="refcount">Return value: New reference.</em><p>Return a new reference to an arbitrary object in the <em>set</em>, and removes the object from the <em>set</em>. Return <em>NULL</em> on failure. Raise <a class="reference internal" href="../library/exceptions.html#exceptions.KeyError" title="exceptions.KeyError"><tt class="xref py py-exc docutils literal"><span class="pre">KeyError</span></tt></a> if the set is empty. Raise a <a class="reference internal" href="../library/exceptions.html#exceptions.SystemError" title="exceptions.SystemError"><tt class="xref py py-exc docutils literal"><span class="pre">SystemError</span></tt></a> if <em>set</em> is an not an instance of <a class="reference internal" href="../library/stdtypes.html#set" title="set"><tt class="xref py py-class docutils literal"><span class="pre">set</span></tt></a> or its subtype.</p> </dd></dl> <dl class="function"> <dt id="PySet_Clear"> int <tt class="descname">PySet_Clear</tt><big>(</big><a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a><em> *set</em><big>)</big><a class="headerlink" href="#PySet_Clear" title="Permalink to this definition">¶</a></dt> <dd><p>Empty an existing set of all elements.</p> </dd></dl> </div> </div> </div> </div> <div class="sphinxsidebar"> <div class="sphinxsidebarwrapper"> <h4>Previous topic</h4> <p class="topless"><a href="datetime.html" title="previous chapter">DateTime Objects</a></p> <h4>Next topic</h4> <p class="topless"><a href="code.html" title="next chapter">Code Objects</a></p> <h3>This Page</h3> <ul class="this-page-menu"> <li><a href="../bugs.html">Report a Bug</a></li> <li><a href="../_sources/c-api/set.txt" rel="nofollow">Show Source</a></li> </ul> <div id="searchbox" style="display: none"> <h3>Quick search</h3> <form class="search" action="../search.html" method="get"> <input 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> <p class="searchtip" style="font-size: 90%"> Enter search terms or a module, class or function name. </p> </div> <script type="text/javascript">$('#searchbox').show(0);</script> </div> </div> <div class="clearer"></div> </div> <div class="related"> <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="code.html" title="Code Objects" >next</a> |</li> <li class="right" > <a href="datetime.html" title="DateTime Objects" >previous</a> |</li> <li><img src="../_static/py.png" alt="" style="vertical-align: middle; margin-top: -1px"/></li> <li><a href="http://www.python.org/">Python</a> »</li> <li> <a href="../index.html">Python 2.7.5 documentation</a> » </li> <li><a href="index.html" >Python/C API Reference Manual</a> »</li> <li><a href="concrete.html" >Concrete Objects Layer</a> »</li> </ul> </div> <div class="footer"> © <a href="../copyright.html">Copyright</a> 1990-2020, Python Software Foundation. <br /> The Python Software Foundation is a non-profit corporation. <a href="http://www.python.org/psf/donations/">Please donate.</a> <br /> Last updated on Oct 13, 2020. <a href="../bugs.html">Found a bug</a>? <br /> Created using <a href="http://sphinx.pocoo.org/">Sphinx</a> 1.1.3. </div> </body> </html>
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