Edit File: bytearray.html
<!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>Byte Array Objects — Python v2.6.6 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: '2.6.6', COLLAPSE_MODINDEX: false, FILE_SUFFIX: '.html', HAS_SOURCE: true }; </script> <script type="text/javascript" src="../_static/jquery.js"></script> <script type="text/javascript" src="../_static/doctools.js"></script> <link rel="search" type="application/opensearchdescription+xml" title="Search within Python v2.6.6 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 v2.6.6 documentation" href="../index.html" /> <link rel="up" title="Concrete Objects Layer" href="concrete.html" /> <link rel="next" title="String/Bytes Objects" href="string.html" /> <link rel="prev" title="Complex Number Objects" href="complex.html" /> <link rel="shortcut icon" type="image/png" href="../_static/py.png" /> </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="../modindex.html" title="Global Module Index" accesskey="M">modules</a> |</li> <li class="right" > <a href="string.html" title="String/Bytes Objects" accesskey="N">next</a> |</li> <li class="right" > <a href="complex.html" title="Complex Number Objects" accesskey="P">previous</a> |</li> <li><img src="../_static/py.png" alt="" style="vertical-align: middle; margin-top: -1px"/></li> <li><a href="../index.html">Python v2.6.6 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="byte-array-objects"> <span id="bytearrayobjects"></span><h1>Byte Array Objects<a class="headerlink" href="#byte-array-objects" title="Permalink to this headline">¶</a></h1> <p class="versionadded" id="index-3"> <span class="versionmodified">New in version 2.6.</span></p> <dl class="ctype"> <dt id="PyByteArrayObject"> <tt class="descname">PyByteArrayObject</tt><a class="headerlink" href="#PyByteArrayObject" title="Permalink to this definition">¶</a></dt> <dd>This subtype of <a title="PyObject" class="reference external" href="structures.html#PyObject"><tt class="xref docutils literal"><span class="pre">PyObject</span></tt></a> represents a Python bytearray object.</dd></dl> <dl class="cvar"> <dt id="PyByteArray_Type"> <a title="PyTypeObject" class="reference external" href="type.html#PyTypeObject">PyTypeObject</a> <tt class="descname">PyByteArray_Type</tt><a class="headerlink" href="#PyByteArray_Type" title="Permalink to this definition">¶</a></dt> <dd>This instance of <a title="PyTypeObject" class="reference external" href="type.html#PyTypeObject"><tt class="xref docutils literal"><span class="pre">PyTypeObject</span></tt></a> represents the Python bytearray type; it is the same object as <tt class="docutils literal"><span class="pre">bytearray</span></tt> in the Python layer.</dd></dl> <div class="section" id="type-check-macros"> <h2>Type check macros<a class="headerlink" href="#type-check-macros" title="Permalink to this headline">¶</a></h2> <dl class="cfunction"> <dt id="PyByteArray_Check"> int <tt class="descname">PyByteArray_Check</tt><big>(</big><a title="PyObject" class="reference external" href="structures.html#PyObject">PyObject</a><em> *o</em><big>)</big><a class="headerlink" href="#PyByteArray_Check" title="Permalink to this definition">¶</a></dt> <dd>Return true if the object <em>o</em> is a bytearray object or an instance of a subtype of the bytearray type.</dd></dl> <dl class="cfunction"> <dt id="PyByteArray_CheckExact"> int <tt class="descname">PyByteArray_CheckExact</tt><big>(</big><a title="PyObject" class="reference external" href="structures.html#PyObject">PyObject</a><em> *o</em><big>)</big><a class="headerlink" href="#PyByteArray_CheckExact" title="Permalink to this definition">¶</a></dt> <dd>Return true if the object <em>o</em> is a bytearray object, but not an instance of a subtype of the bytearray type.</dd></dl> </div> <div class="section" id="direct-api-functions"> <h2>Direct API functions<a class="headerlink" href="#direct-api-functions" title="Permalink to this headline">¶</a></h2> <dl class="cfunction"> <dt id="PyByteArray_FromObject"> <a title="PyObject" class="reference external" href="structures.html#PyObject">PyObject</a>* <tt class="descname">PyByteArray_FromObject</tt><big>(</big><a title="PyObject" class="reference external" href="structures.html#PyObject">PyObject</a><em> *o</em><big>)</big><a class="headerlink" href="#PyByteArray_FromObject" title="Permalink to this definition">¶</a></dt> <dd>Return a new bytearray object from any object, <em>o</em>, that implements the buffer protocol.</dd></dl> <dl class="cfunction"> <dt id="PyByteArray_FromStringAndSize"> <a title="PyObject" class="reference external" href="structures.html#PyObject">PyObject</a>* <tt class="descname">PyByteArray_FromStringAndSize</tt><big>(</big>const char<em> *string</em>, Py_ssize_t<em> len</em><big>)</big><a class="headerlink" href="#PyByteArray_FromStringAndSize" title="Permalink to this definition">¶</a></dt> <dd>Create a new bytearray object from <em>string</em> and its length, <em>len</em>. On failure, <em>NULL</em> is returned.</dd></dl> <dl class="cfunction"> <dt id="PyByteArray_Concat"> <a title="PyObject" class="reference external" href="structures.html#PyObject">PyObject</a>* <tt class="descname">PyByteArray_Concat</tt><big>(</big><a title="PyObject" class="reference external" href="structures.html#PyObject">PyObject</a><em> *a</em>, <a title="PyObject" class="reference external" href="structures.html#PyObject">PyObject</a><em> *b</em><big>)</big><a class="headerlink" href="#PyByteArray_Concat" title="Permalink to this definition">¶</a></dt> <dd>Concat bytearrays <em>a</em> and <em>b</em> and return a new bytearray with the result.</dd></dl> <dl class="cfunction"> <dt id="PyByteArray_Size"> Py_ssize_t <tt class="descname">PyByteArray_Size</tt><big>(</big><a title="PyObject" class="reference external" href="structures.html#PyObject">PyObject</a><em> *bytearray</em><big>)</big><a class="headerlink" href="#PyByteArray_Size" title="Permalink to this definition">¶</a></dt> <dd>Return the size of <em>bytearray</em> after checking for a <em>NULL</em> pointer.</dd></dl> <dl class="cfunction"> <dt id="PyByteArray_AsString"> char* <tt class="descname">PyByteArray_AsString</tt><big>(</big><a title="PyObject" class="reference external" href="structures.html#PyObject">PyObject</a><em> *bytearray</em><big>)</big><a class="headerlink" href="#PyByteArray_AsString" title="Permalink to this definition">¶</a></dt> <dd>Return the contents of <em>bytearray</em> as a char array after checking for a <em>NULL</em> pointer.</dd></dl> <dl class="cfunction"> <dt id="PyByteArray_Resize"> int <tt class="descname">PyByteArray_Resize</tt><big>(</big><a title="PyObject" class="reference external" href="structures.html#PyObject">PyObject</a><em> *bytearray</em>, Py_ssize_t<em> len</em><big>)</big><a class="headerlink" href="#PyByteArray_Resize" title="Permalink to this definition">¶</a></dt> <dd>Resize the internal buffer of <em>bytearray</em> to <em>len</em>.</dd></dl> </div> <div class="section" id="macros"> <h2>Macros<a class="headerlink" href="#macros" title="Permalink to this headline">¶</a></h2> <p>These macros trade safety for speed and they don’t check pointers.</p> <dl class="cfunction"> <dt id="PyByteArray_AS_STRING"> char* <tt class="descname">PyByteArray_AS_STRING</tt><big>(</big><a title="PyObject" class="reference external" href="structures.html#PyObject">PyObject</a><em> *bytearray</em><big>)</big><a class="headerlink" href="#PyByteArray_AS_STRING" title="Permalink to this definition">¶</a></dt> <dd>Macro version of <a title="PyByteArray_AsString" class="reference internal" href="#PyByteArray_AsString"><tt class="xref docutils literal"><span class="pre">PyByteArray_AsString()</span></tt></a>.</dd></dl> <dl class="cfunction"> <dt id="PyByteArray_GET_SIZE"> Py_ssize_t <tt class="descname">PyByteArray_GET_SIZE</tt><big>(</big><a title="PyObject" class="reference external" href="structures.html#PyObject">PyObject</a><em> *bytearray</em><big>)</big><a class="headerlink" href="#PyByteArray_GET_SIZE" title="Permalink to this definition">¶</a></dt> <dd>Macro version of <a title="PyByteArray_Size" class="reference internal" href="#PyByteArray_Size"><tt class="xref docutils literal"><span class="pre">PyByteArray_Size()</span></tt></a>.</dd></dl> </div> </div> </div> </div> </div> <div class="sphinxsidebar"> <div class="sphinxsidebarwrapper"> <h3><a href="../contents.html">Table Of Contents</a></h3> <ul> <li><a class="reference external" href="#">Byte Array Objects</a><ul> <li><a class="reference external" href="#type-check-macros">Type check macros</a></li> <li><a class="reference external" href="#direct-api-functions">Direct API functions</a></li> <li><a class="reference external" href="#macros">Macros</a></li> </ul> </li> </ul> <h4>Previous topic</h4> <p class="topless"><a href="complex.html" title="previous chapter">Complex Number Objects</a></p> <h4>Next 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