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  <div class="section" id="cobjects">
<span id="id1"></span><h1>CObjects<a class="headerlink" href="#cobjects" title="Permalink to this headline">¶</a></h1>
<div class="admonition warning" id="index-0">
<p class="first admonition-title">Warning</p>
<p class="last">The CObject API is deprecated as of Python 2.7.  Please switch to the new
<a class="reference internal" href="capsule.html#capsules"><em>Capsules</em></a> API.</p>
</div>
<dl class="type">
<dt id="PyCObject">
<tt class="descname">PyCObject</tt><a class="headerlink" href="#PyCObject" 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 an opaque value, useful for C
extension modules who need to pass an opaque value (as a <tt class="xref c c-type docutils literal"><span class="pre">void*</span></tt>
pointer) through Python code to other C code.  It is often used to make a C
function pointer defined in one module available to other modules, so the
regular import mechanism can be used to access C APIs defined in dynamically
loaded modules.</p>
</dd></dl>

<dl class="function">
<dt id="PyCObject_Check">
int <tt class="descname">PyCObject_Check</tt><big>(</big><a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a><em>&nbsp;*p</em><big>)</big><a class="headerlink" href="#PyCObject_Check" title="Permalink to this definition">¶</a></dt>
<dd><p>Return true if its argument is a <a class="reference internal" href="#PyCObject" title="PyCObject"><tt class="xref c c-type docutils literal"><span class="pre">PyCObject</span></tt></a>.</p>
</dd></dl>

<dl class="function">
<dt id="PyCObject_FromVoidPtr">
<a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a>* <tt class="descname">PyCObject_FromVoidPtr</tt><big>(</big>void*<em>&nbsp;cobj</em>, void (*destr)(void<em>&nbsp;*)</em><big>)</big><a class="headerlink" href="#PyCObject_FromVoidPtr" title="Permalink to this definition">¶</a></dt>
<dd><em class="refcount">Return value: New reference.</em><p>Create a <a class="reference internal" href="#PyCObject" title="PyCObject"><tt class="xref c c-type docutils literal"><span class="pre">PyCObject</span></tt></a> from the <tt class="docutils literal"><span class="pre">void</span> <span class="pre">*</span></tt> <em>cobj</em>.  The <em>destr</em> function
will be called when the object is reclaimed, unless it is <em>NULL</em>.</p>
</dd></dl>

<dl class="function">
<dt id="PyCObject_FromVoidPtrAndDesc">
<a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a>* <tt class="descname">PyCObject_FromVoidPtrAndDesc</tt><big>(</big>void*<em>&nbsp;cobj</em>, void*<em>&nbsp;desc</em>, void (*destr)(void<em>&nbsp;*</em>, void<em>&nbsp;*)</em><big>)</big><a class="headerlink" href="#PyCObject_FromVoidPtrAndDesc" title="Permalink to this definition">¶</a></dt>
<dd><em class="refcount">Return value: New reference.</em><p>Create a <a class="reference internal" href="#PyCObject" title="PyCObject"><tt class="xref c c-type docutils literal"><span class="pre">PyCObject</span></tt></a> from the <tt class="xref c c-type docutils literal"><span class="pre">void</span> <span class="pre">*</span></tt> <em>cobj</em>.  The <em>destr</em>
function will be called when the object is reclaimed. The <em>desc</em> argument can
be used to pass extra callback data for the destructor function.</p>
</dd></dl>

<dl class="function">
<dt id="PyCObject_AsVoidPtr">
void* <tt class="descname">PyCObject_AsVoidPtr</tt><big>(</big><a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a>*<em>&nbsp;self</em><big>)</big><a class="headerlink" href="#PyCObject_AsVoidPtr" title="Permalink to this definition">¶</a></dt>
<dd><p>Return the object <tt class="xref c c-type docutils literal"><span class="pre">void</span> <span class="pre">*</span></tt> that the <a class="reference internal" href="#PyCObject" title="PyCObject"><tt class="xref c c-type docutils literal"><span class="pre">PyCObject</span></tt></a> <em>self</em> was
created with.</p>
</dd></dl>

<dl class="function">
<dt id="PyCObject_GetDesc">
void* <tt class="descname">PyCObject_GetDesc</tt><big>(</big><a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a>*<em>&nbsp;self</em><big>)</big><a class="headerlink" href="#PyCObject_GetDesc" title="Permalink to this definition">¶</a></dt>
<dd><p>Return the description <tt class="xref c c-type docutils literal"><span class="pre">void</span> <span class="pre">*</span></tt> that the <a class="reference internal" href="#PyCObject" title="PyCObject"><tt class="xref c c-type docutils literal"><span class="pre">PyCObject</span></tt></a> <em>self</em> was
created with.</p>
</dd></dl>

<dl class="function">
<dt id="PyCObject_SetVoidPtr">
int <tt class="descname">PyCObject_SetVoidPtr</tt><big>(</big><a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a>*<em>&nbsp;self</em>, void*<em>&nbsp;cobj</em><big>)</big><a class="headerlink" href="#PyCObject_SetVoidPtr" title="Permalink to this definition">¶</a></dt>
<dd><p>Set the void pointer inside <em>self</em> to <em>cobj</em>. The <a class="reference internal" href="#PyCObject" title="PyCObject"><tt class="xref c c-type docutils literal"><span class="pre">PyCObject</span></tt></a> must not
have an associated destructor. Return true on success, false on failure.</p>
</dd></dl>

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