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  <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-0">
<span class="versionmodified">New in version 2.6.</span></p>
<dl class="type">
<dt id="PyByteArrayObject">
<tt class="descname">PyByteArrayObject</tt><a class="headerlink" href="#PyByteArrayObject" 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> represents a Python bytearray object.</p>
</dd></dl>

<dl class="var">
<dt id="PyByteArray_Type">
<a class="reference internal" href="type.html#PyTypeObject" title="PyTypeObject">PyTypeObject</a> <tt class="descname">PyByteArray_Type</tt><a class="headerlink" href="#PyByteArray_Type" title="Permalink to this definition">¶</a></dt>
<dd><p>This 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> 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.</p>
</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="function">
<dt id="PyByteArray_Check">
int <tt class="descname">PyByteArray_Check</tt><big>(</big><a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a><em>&nbsp;*o</em><big>)</big><a class="headerlink" href="#PyByteArray_Check" title="Permalink to this definition">¶</a></dt>
<dd><p>Return true if the object <em>o</em> is a bytearray object or an instance of a
subtype of the bytearray type.</p>
</dd></dl>

<dl class="function">
<dt id="PyByteArray_CheckExact">
int <tt class="descname">PyByteArray_CheckExact</tt><big>(</big><a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a><em>&nbsp;*o</em><big>)</big><a class="headerlink" href="#PyByteArray_CheckExact" title="Permalink to this definition">¶</a></dt>
<dd><p>Return true if the object <em>o</em> is a bytearray object, but not an instance of a
subtype of the bytearray type.</p>
</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="function">
<dt id="PyByteArray_FromObject">
<a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a>* <tt class="descname">PyByteArray_FromObject</tt><big>(</big><a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a><em>&nbsp;*o</em><big>)</big><a class="headerlink" href="#PyByteArray_FromObject" title="Permalink to this definition">¶</a></dt>
<dd><p>Return a new bytearray object from any object, <em>o</em>, that implements the
buffer protocol.</p>
</dd></dl>

<dl class="function">
<dt id="PyByteArray_FromStringAndSize">
<a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a>* <tt class="descname">PyByteArray_FromStringAndSize</tt><big>(</big>const char<em>&nbsp;*string</em>, Py_ssize_t<em>&nbsp;len</em><big>)</big><a class="headerlink" href="#PyByteArray_FromStringAndSize" title="Permalink to this definition">¶</a></dt>
<dd><p>Create a new bytearray object from <em>string</em> and its length, <em>len</em>.  On
failure, <em>NULL</em> is returned.</p>
</dd></dl>

<dl class="function">
<dt id="PyByteArray_Concat">
<a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a>* <tt class="descname">PyByteArray_Concat</tt><big>(</big><a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a><em>&nbsp;*a</em>, <a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a><em>&nbsp;*b</em><big>)</big><a class="headerlink" href="#PyByteArray_Concat" title="Permalink to this definition">¶</a></dt>
<dd><p>Concat bytearrays <em>a</em> and <em>b</em> and return a new bytearray with the result.</p>
</dd></dl>

<dl class="function">
<dt id="PyByteArray_Size">
Py_ssize_t <tt class="descname">PyByteArray_Size</tt><big>(</big><a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a><em>&nbsp;*bytearray</em><big>)</big><a class="headerlink" href="#PyByteArray_Size" title="Permalink to this definition">¶</a></dt>
<dd><p>Return the size of <em>bytearray</em> after checking for a <em>NULL</em> pointer.</p>
</dd></dl>

<dl class="function">
<dt id="PyByteArray_AsString">
char* <tt class="descname">PyByteArray_AsString</tt><big>(</big><a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a><em>&nbsp;*bytearray</em><big>)</big><a class="headerlink" href="#PyByteArray_AsString" title="Permalink to this definition">¶</a></dt>
<dd><p>Return the contents of <em>bytearray</em> as a char array after checking for a
<em>NULL</em> pointer.</p>
</dd></dl>

<dl class="function">
<dt id="PyByteArray_Resize">
int <tt class="descname">PyByteArray_Resize</tt><big>(</big><a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a><em>&nbsp;*bytearray</em>, Py_ssize_t<em>&nbsp;len</em><big>)</big><a class="headerlink" href="#PyByteArray_Resize" title="Permalink to this definition">¶</a></dt>
<dd><p>Resize the internal buffer of <em>bytearray</em> to <em>len</em>.</p>
</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&#8217;t check pointers.</p>
<dl class="function">
<dt id="PyByteArray_AS_STRING">
char* <tt class="descname">PyByteArray_AS_STRING</tt><big>(</big><a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a><em>&nbsp;*bytearray</em><big>)</big><a class="headerlink" href="#PyByteArray_AS_STRING" title="Permalink to this definition">¶</a></dt>
<dd><p>Macro version of <a class="reference internal" href="#PyByteArray_AsString" title="PyByteArray_AsString"><tt class="xref c c-func docutils literal"><span class="pre">PyByteArray_AsString()</span></tt></a>.</p>
</dd></dl>

<dl class="function">
<dt id="PyByteArray_GET_SIZE">
Py_ssize_t <tt class="descname">PyByteArray_GET_SIZE</tt><big>(</big><a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a><em>&nbsp;*bytearray</em><big>)</big><a class="headerlink" href="#PyByteArray_GET_SIZE" title="Permalink to this definition">¶</a></dt>
<dd><p>Macro version of <a class="reference internal" href="#PyByteArray_Size" title="PyByteArray_Size"><tt class="xref c c-func docutils literal"><span class="pre">PyByteArray_Size()</span></tt></a>.</p>
</dd></dl>

</div>
</div>


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  <h3><a href="../contents.html">Table Of Contents</a></h3>
  <ul>
<li><a class="reference internal" href="#">Byte Array Objects</a><ul>
<li><a class="reference internal" href="#type-check-macros">Type check macros</a></li>
<li><a class="reference internal" href="#direct-api-functions">Direct API functions</a></li>
<li><a class="reference internal" href="#macros">Macros</a></li>
</ul>
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