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  182.   <section id="descriptor-objects">

  183. <span id="id1"></span><h1>Descriptor Objects<a class="headerlink" href="#descriptor-objects" title="Link to this heading">¶</a></h1>

  184. <p>“Descriptors” are objects that describe some attribute of an object. They are

  185. found in the dictionary of type objects.</p>

  186. <dl class="c var">

  187. <dt class="sig sig-object c" id="c.PyProperty_Type">

  188. <a class="reference internal" href="type.html#c.PyTypeObject" title="PyTypeObject"><span class="n"><span class="pre">PyTypeObject</span></span></a><span class="w"> </span><span class="sig-name descname"><span class="n"><span class="pre">PyProperty_Type</span></span></span><a class="headerlink" href="#c.PyProperty_Type" title="Link to this definition">¶</a><br /></dt>

  189. <dd><em class="stableabi"> Part of the <a class="reference internal" href="stable.html#stable"><span class="std std-ref">Stable ABI</span></a>.</em><p>The type object for the built-in descriptor types.</p>

  190. </dd></dl>

  191. 

  192. <dl class="c function">

  193. <dt class="sig sig-object c" id="c.PyDescr_NewGetSet">

  194. <a class="reference internal" href="structures.html#c.PyObject" title="PyObject"><span class="n"><span class="pre">PyObject</span></span></a><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="sig-name descname"><span class="n"><span class="pre">PyDescr_NewGetSet</span></span></span><span class="sig-paren">(</span><a class="reference internal" href="type.html#c.PyTypeObject" title="PyTypeObject"><span class="n"><span class="pre">PyTypeObject</span></span></a><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">type</span></span>, <span class="k"><span class="pre">struct</span></span><span class="w"> </span><a class="reference internal" href="structures.html#c.PyGetSetDef" title="PyGetSetDef"><span class="n"><span class="pre">PyGetSetDef</span></span></a><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">getset</span></span><span class="sig-paren">)</span><a class="headerlink" href="#c.PyDescr_NewGetSet" title="Link to this definition">¶</a><br /></dt>

  195. <dd><em class="refcount">Return value: New reference.</em><em class="stableabi"> Part of the <a class="reference internal" href="stable.html#stable"><span class="std std-ref">Stable ABI</span></a>.</em></dd></dl>

  196. 

  197. <dl class="c function">

  198. <dt class="sig sig-object c" id="c.PyDescr_NewMember">

  199. <a class="reference internal" href="structures.html#c.PyObject" title="PyObject"><span class="n"><span class="pre">PyObject</span></span></a><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="sig-name descname"><span class="n"><span class="pre">PyDescr_NewMember</span></span></span><span class="sig-paren">(</span><a class="reference internal" href="type.html#c.PyTypeObject" title="PyTypeObject"><span class="n"><span class="pre">PyTypeObject</span></span></a><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">type</span></span>, <span class="k"><span class="pre">struct</span></span><span class="w"> </span><a class="reference internal" href="structures.html#c.PyMemberDef" title="PyMemberDef"><span class="n"><span class="pre">PyMemberDef</span></span></a><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">meth</span></span><span class="sig-paren">)</span><a class="headerlink" href="#c.PyDescr_NewMember" title="Link to this definition">¶</a><br /></dt>

  200. <dd><em class="refcount">Return value: New reference.</em><em class="stableabi"> Part of the <a class="reference internal" href="stable.html#stable"><span class="std std-ref">Stable ABI</span></a>.</em></dd></dl>

  201. 

  202. <dl class="c function">

  203. <dt class="sig sig-object c" id="c.PyDescr_NewMethod">

  204. <a class="reference internal" href="structures.html#c.PyObject" title="PyObject"><span class="n"><span class="pre">PyObject</span></span></a><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="sig-name descname"><span class="n"><span class="pre">PyDescr_NewMethod</span></span></span><span class="sig-paren">(</span><a class="reference internal" href="type.html#c.PyTypeObject" title="PyTypeObject"><span class="n"><span class="pre">PyTypeObject</span></span></a><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">type</span></span>, <span class="k"><span class="pre">struct</span></span><span class="w"> </span><a class="reference internal" href="structures.html#c.PyMethodDef" title="PyMethodDef"><span class="n"><span class="pre">PyMethodDef</span></span></a><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">meth</span></span><span class="sig-paren">)</span><a class="headerlink" href="#c.PyDescr_NewMethod" title="Link to this definition">¶</a><br /></dt>

  205. <dd><em class="refcount">Return value: New reference.</em><em class="stableabi"> Part of the <a class="reference internal" href="stable.html#stable"><span class="std std-ref">Stable ABI</span></a>.</em></dd></dl>

  206. 

  207. <dl class="c function">

  208. <dt class="sig sig-object c" id="c.PyDescr_NewWrapper">

  209. <a class="reference internal" href="structures.html#c.PyObject" title="PyObject"><span class="n"><span class="pre">PyObject</span></span></a><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="sig-name descname"><span class="n"><span class="pre">PyDescr_NewWrapper</span></span></span><span class="sig-paren">(</span><a class="reference internal" href="type.html#c.PyTypeObject" title="PyTypeObject"><span class="n"><span class="pre">PyTypeObject</span></span></a><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">type</span></span>, <span class="k"><span class="pre">struct</span></span><span class="w"> </span><span class="n"><span class="pre">wrapperbase</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">wrapper</span></span>, <span class="kt"><span class="pre">void</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">wrapped</span></span><span class="sig-paren">)</span><a class="headerlink" href="#c.PyDescr_NewWrapper" title="Link to this definition">¶</a><br /></dt>

  210. <dd><em class="refcount">Return value: New reference.</em></dd></dl>

  211. 

  212. <dl class="c function">

  213. <dt class="sig sig-object c" id="c.PyDescr_NewClassMethod">

  214. <a class="reference internal" href="structures.html#c.PyObject" title="PyObject"><span class="n"><span class="pre">PyObject</span></span></a><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="sig-name descname"><span class="n"><span class="pre">PyDescr_NewClassMethod</span></span></span><span class="sig-paren">(</span><a class="reference internal" href="type.html#c.PyTypeObject" title="PyTypeObject"><span class="n"><span class="pre">PyTypeObject</span></span></a><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">type</span></span>, <a class="reference internal" href="structures.html#c.PyMethodDef" title="PyMethodDef"><span class="n"><span class="pre">PyMethodDef</span></span></a><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">method</span></span><span class="sig-paren">)</span><a class="headerlink" href="#c.PyDescr_NewClassMethod" title="Link to this definition">¶</a><br /></dt>

  215. <dd><em class="refcount">Return value: New reference.</em><em class="stableabi"> Part of the <a class="reference internal" href="stable.html#stable"><span class="std std-ref">Stable ABI</span></a>.</em></dd></dl>

  216. 

  217. <dl class="c function">

  218. <dt class="sig sig-object c" id="c.PyDescr_IsData">

  219. <span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="sig-name descname"><span class="n"><span class="pre">PyDescr_IsData</span></span></span><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject"><span class="n"><span class="pre">PyObject</span></span></a><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">descr</span></span><span class="sig-paren">)</span><a class="headerlink" href="#c.PyDescr_IsData" title="Link to this definition">¶</a><br /></dt>

  220. <dd><p>Return non-zero if the descriptor objects <em>descr</em> describes a data attribute, or

  221. <code class="docutils literal notranslate"><span class="pre">0</span></code> if it describes a method.  <em>descr</em> must be a descriptor object; there is

  222. no error checking.</p>

  223. </dd></dl>

  224. 

  225. <dl class="c function">

  226. <dt class="sig sig-object c" id="c.PyWrapper_New">

  227. <a class="reference internal" href="structures.html#c.PyObject" title="PyObject"><span class="n"><span class="pre">PyObject</span></span></a><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="sig-name descname"><span class="n"><span class="pre">PyWrapper_New</span></span></span><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject"><span class="n"><span class="pre">PyObject</span></span></a><span class="p"><span class="pre">*</span></span>, <a class="reference internal" href="structures.html#c.PyObject" title="PyObject"><span class="n"><span class="pre">PyObject</span></span></a><span class="p"><span class="pre">*</span></span><span class="sig-paren">)</span><a class="headerlink" href="#c.PyWrapper_New" title="Link to this definition">¶</a><br /></dt>

  228. <dd><em class="refcount">Return value: New reference.</em><em class="stableabi"> Part of the <a class="reference internal" href="stable.html#stable"><span class="std std-ref">Stable ABI</span></a>.</em></dd></dl>

  229. 

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