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<div class="section" id="module-types">
<h1>8.10. <tt class="xref docutils literal"><span class="pre">types</span></tt> — Names for built-in types<a class="headerlink" href="#module-types" title="Permalink to this headline">¶</a></h1>
<p>This module defines names for some object types that are used by the standard
Python interpreter, but not exposed as builtins like <a title="int" class="reference external" href="functions.html#int"><tt class="xref docutils literal"><span class="pre">int</span></tt></a> or
<a title="str" class="reference external" href="functions.html#str"><tt class="xref docutils literal"><span class="pre">str</span></tt></a> are. Also, it does not include some of the types that arise
transparently during processing such as the <tt class="docutils literal"><span class="pre">listiterator</span></tt> type.</p>
<p>Typical use is for <a title="isinstance" class="reference external" href="functions.html#isinstance"><tt class="xref docutils literal"><span class="pre">isinstance()</span></tt></a> or <a title="issubclass" class="reference external" href="functions.html#issubclass"><tt class="xref docutils literal"><span class="pre">issubclass()</span></tt></a> checks.</p>
<p>The module defines the following names:</p>
<dl class="data">
<dt id="types.FunctionType">
<tt class="descclassname">types.</tt><tt class="descname">FunctionType</tt><a class="headerlink" href="#types.FunctionType" title="Permalink to this definition">¶</a></dt>
<dt id="types.LambdaType">
<tt class="descclassname">types.</tt><tt class="descname">LambdaType</tt><a class="headerlink" href="#types.LambdaType" title="Permalink to this definition">¶</a></dt>
<dd>The type of user-defined functions and functions created by <a class="reference external" href="../reference/expressions.html#lambda"><tt class="xref docutils literal"><span class="pre">lambda</span></tt></a>
expressions.</dd></dl>
<dl class="data">
<dt id="types.GeneratorType">
<tt class="descclassname">types.</tt><tt class="descname">GeneratorType</tt><a class="headerlink" href="#types.GeneratorType" title="Permalink to this definition">¶</a></dt>
<dd>The type of <a class="reference external" href="../glossary.html#term-generator"><em class="xref">generator</em></a>-iterator objects, produced by calling a
generator function.</dd></dl>
<dl class="data">
<dt id="types.CodeType">
<tt class="descclassname">types.</tt><tt class="descname">CodeType</tt><a class="headerlink" href="#types.CodeType" title="Permalink to this definition">¶</a></dt>
<dd><p id="index-611">The type for code objects such as returned by <a title="compile" class="reference external" href="functions.html#compile"><tt class="xref docutils literal"><span class="pre">compile()</span></tt></a>.</p>
</dd></dl>
<dl class="data">
<dt id="types.MethodType">
<tt class="descclassname">types.</tt><tt class="descname">MethodType</tt><a class="headerlink" href="#types.MethodType" title="Permalink to this definition">¶</a></dt>
<dd>The type of methods of user-defined class instances.</dd></dl>
<dl class="data">
<dt id="types.BuiltinFunctionType">
<tt class="descclassname">types.</tt><tt class="descname">BuiltinFunctionType</tt><a class="headerlink" href="#types.BuiltinFunctionType" title="Permalink to this definition">¶</a></dt>
<dt id="types.BuiltinMethodType">
<tt class="descclassname">types.</tt><tt class="descname">BuiltinMethodType</tt><a class="headerlink" href="#types.BuiltinMethodType" title="Permalink to this definition">¶</a></dt>
<dd>The type of built-in functions like <a title="len" class="reference external" href="functions.html#len"><tt class="xref docutils literal"><span class="pre">len()</span></tt></a> or <a title="sys.exit" class="reference external" href="sys.html#sys.exit"><tt class="xref docutils literal"><span class="pre">sys.exit()</span></tt></a>, and
methods of built-in classes. (Here, the term “built-in” means “written in
C”.)</dd></dl>
<dl class="data">
<dt id="types.ModuleType">
<tt class="descclassname">types.</tt><tt class="descname">ModuleType</tt><a class="headerlink" href="#types.ModuleType" title="Permalink to this definition">¶</a></dt>
<dd>The type of modules.</dd></dl>
<dl class="data">
<dt id="types.TracebackType">
<tt class="descclassname">types.</tt><tt class="descname">TracebackType</tt><a class="headerlink" href="#types.TracebackType" title="Permalink to this definition">¶</a></dt>
<dd>The type of traceback objects such as found in <tt class="docutils literal"><span class="pre">sys.exc_info()[2]</span></tt>.</dd></dl>
<dl class="data">
<dt id="types.FrameType">
<tt class="descclassname">types.</tt><tt class="descname">FrameType</tt><a class="headerlink" href="#types.FrameType" title="Permalink to this definition">¶</a></dt>
<dd>The type of frame objects such as found in <tt class="docutils literal"><span class="pre">tb.tb_frame</span></tt> if <tt class="docutils literal"><span class="pre">tb</span></tt> is a
traceback object.</dd></dl>
<dl class="data">
<dt id="types.GetSetDescriptorType">
<tt class="descclassname">types.</tt><tt class="descname">GetSetDescriptorType</tt><a class="headerlink" href="#types.GetSetDescriptorType" title="Permalink to this definition">¶</a></dt>
<dd>The type of objects defined in extension modules with <tt class="docutils literal"><span class="pre">PyGetSetDef</span></tt>, such
as <tt class="docutils literal"><span class="pre">FrameType.f_locals</span></tt> or <tt class="docutils literal"><span class="pre">array.array.typecode</span></tt>. This type is used as
descriptor for object attributes; it has the same purpose as the
<a title="property" class="reference external" href="functions.html#property"><tt class="xref docutils literal"><span class="pre">property</span></tt></a> type, but for classes defined in extension modules.</dd></dl>
<dl class="data">
<dt id="types.MemberDescriptorType">
<tt class="descclassname">types.</tt><tt class="descname">MemberDescriptorType</tt><a class="headerlink" href="#types.MemberDescriptorType" title="Permalink to this definition">¶</a></dt>
<dd>The type of objects defined in extension modules with <tt class="docutils literal"><span class="pre">PyMemberDef</span></tt>, such
as <tt class="docutils literal"><span class="pre">datetime.timedelta.days</span></tt>. This type is used as descriptor for simple C
data members which use standard conversion functions; it has the same purpose
as the <a title="property" class="reference external" href="functions.html#property"><tt class="xref docutils literal"><span class="pre">property</span></tt></a> type, but for classes defined in extension modules.
In other implementations of Python, this type may be identical to
<tt class="docutils literal"><span class="pre">GetSetDescriptorType</span></tt>.</dd></dl>
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