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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"><span class="std std-ref">Capsules</span></a> API.</p>
</div>
<dl class="type">
<dt id="c.PyCObject">
<code class="descname">PyCObject</code><a class="headerlink" href="#c.PyCObject" title="Permalink to this definition">¶</a></dt>
<dd><p>This subtype of <a class="reference internal" href="structures.html#c.PyObject" title="PyObject"><code class="xref c c-type docutils literal notranslate"><span class="pre">PyObject</span></code></a> represents an opaque value, useful for C
extension modules who need to pass an opaque value (as a <code class="xref c c-type docutils literal notranslate"><span class="pre">void*</span></code>
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="c.PyCObject_Check">
int <code class="descname">PyCObject_Check</code><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em>&nbsp;*p</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyCObject_Check" title="Permalink to this definition">¶</a></dt>
<dd><p>Return true if its argument is a <a class="reference internal" href="#c.PyCObject" title="PyCObject"><code class="xref c c-type docutils literal notranslate"><span class="pre">PyCObject</span></code></a>.</p>
</dd></dl>

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

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

<dl class="function">
<dt id="c.PyCObject_SetVoidPtr">
int <code class="descname">PyCObject_SetVoidPtr</code><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a>*<em>&nbsp;self</em>, void*<em>&nbsp;cobj</em><span class="sig-paren">)</span><a class="headerlink" href="#c.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="#c.PyCObject" title="PyCObject"><code class="xref c c-type docutils literal notranslate"><span class="pre">PyCObject</span></code></a> must not
have an associated destructor. Return true on success, false on failure.</p>
</dd></dl>

</div>


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