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Initial commit of OpenSPARC T2 architecture model.
[OpenSPARC-T2-SAM] / sam-t2 / devtools / v9 / html / python / api / noneObject.html
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54<H2><A NAME="SECTION009120000000000000000"></A><A NAME="noneObject"></A>
55<BR>
567.1.2 The None Object
57</H2>
58
59<P>
60<a id='l2h-365' xml:id='l2h-365'></a>Note that the <tt class="ctype">PyTypeObject</tt> for <code>None</code> is not directly
61exposed in the Python/C API. Since <code>None</code> is a singleton,
62testing for object identity (using "<tt class="samp">==</tt>" in C) is sufficient.
63There is no <tt class="cfunction">PyNone_Check()</tt> function for the same reason.
64
65<P>
66<dl><dt>PyObject* <b><tt id='l2h-366' xml:id='l2h-366' class="cdata">Py_None</tt></b></dt>
67<dd>
68 The Python <code>None</code> object, denoting lack of value. This object
69 has no methods. It needs to be treated just like any other object
70 with respect to reference counts.
71</dd></dl>
72
73<P>
74<dl><dt><b><tt id='l2h-367' xml:id='l2h-367' class="macro">Py_RETURN_NONE</tt></b></dt>
75<dd>
76 Properly handle returning <tt class="cdata">Py_None</tt> from within a C function.
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115<span class="release-info">Release 2.4.2, documentation updated on 28 September 2005.</span>
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Full OpenSPARC architecture tarball including simulator, hypervisor, and OBP.