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<div class="section" id="code-objects">
<span id="codeobjects"></span><h1>Code Objects<a class="headerlink" href="#code-objects" title="Permalink to this headline">¶</a></h1>
<p id="index-0">Code objects are a low-level detail of the CPython implementation.
Each one represents a chunk of executable code that hasn’t yet been
bound into a function.</p>
<dl class="type">
<dt id="PyCodeObject">
<tt class="descname">PyCodeObject</tt><a class="headerlink" href="#PyCodeObject" title="Permalink to this definition">¶</a></dt>
<dd><p>The C structure of the objects used to describe code objects. The
fields of this type are subject to change at any time.</p>
</dd></dl>
<dl class="var">
<dt id="PyCode_Type">
<a class="reference internal" href="type.html#PyTypeObject" title="PyTypeObject">PyTypeObject</a> <tt class="descname">PyCode_Type</tt><a class="headerlink" href="#PyCode_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/code.html#module-code" title="code: Facilities to implement read-eval-print loops."><tt class="xref py py-class docutils literal"><span class="pre">code</span></tt></a> type.</p>
</dd></dl>
<dl class="function">
<dt id="PyCode_Check">
int <tt class="descname">PyCode_Check</tt><big>(</big><a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a><em> *co</em><big>)</big><a class="headerlink" href="#PyCode_Check" title="Permalink to this definition">¶</a></dt>
<dd><p>Return true if <em>co</em> is a <a class="reference internal" href="../library/code.html#module-code" title="code: Facilities to implement read-eval-print loops."><tt class="xref py py-class docutils literal"><span class="pre">code</span></tt></a> object</p>
</dd></dl>
<dl class="function">
<dt id="PyCode_GetNumFree">
int <tt class="descname">PyCode_GetNumFree</tt><big>(</big><a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a><em> *co</em><big>)</big><a class="headerlink" href="#PyCode_GetNumFree" title="Permalink to this definition">¶</a></dt>
<dd><p>Return the number of free variables in <em>co</em>.</p>
</dd></dl>
<dl class="function">
<dt id="PyCode_New">
<a class="reference internal" href="#PyCodeObject" title="PyCodeObject">PyCodeObject</a> *<tt class="descname">PyCode_New</tt><big>(</big>int<em> argcount</em>, int<em> nlocals</em>, int<em> stacksize</em>, int<em> flags</em>, <a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a><em> *code</em>, <a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a><em> *consts</em>, <a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a><em> *names</em>, <a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a><em> *varnames</em>, <a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a><em> *freevars</em>, <a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a><em> *cellvars</em>, <a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a><em> *filename</em>, <a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a><em> *name</em>, int<em> firstlineno</em>, <a class="reference internal" href="structures.html#PyObject" title="PyObject">PyObject</a><em> *lnotab</em><big>)</big><a class="headerlink" href="#PyCode_New" title="Permalink to this definition">¶</a></dt>
<dd><p>Return a new code object. If you need a dummy code object to
create a frame, use <a class="reference internal" href="#PyCode_NewEmpty" title="PyCode_NewEmpty"><tt class="xref c c-func docutils literal"><span class="pre">PyCode_NewEmpty()</span></tt></a> instead. Calling
<a class="reference internal" href="#PyCode_New" title="PyCode_New"><tt class="xref c c-func docutils literal"><span class="pre">PyCode_New()</span></tt></a> directly can bind you to a precise Python
version since the definition of the bytecode changes often.</p>
</dd></dl>
<dl class="function">
<dt id="PyCode_NewEmpty">
int <tt class="descname">PyCode_NewEmpty</tt><big>(</big>const char<em> *filename</em>, const char<em> *funcname</em>, int<em> firstlineno</em><big>)</big><a class="headerlink" href="#PyCode_NewEmpty" title="Permalink to this definition">¶</a></dt>
<dd><p>Return a new empty code object with the specified filename,
function name, and first line number. It is illegal to
<a class="reference internal" href="../library/functions.html#exec" title="exec"><tt class="xref py py-func docutils literal"><span class="pre">exec()</span></tt></a> or <a class="reference internal" href="../library/functions.html#eval" title="eval"><tt class="xref py py-func docutils literal"><span class="pre">eval()</span></tt></a> the resulting code object.</p>
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