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<title>7.2.5.2 Complex Numbers as Python Objects
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<H3><A NAME=
"SECTION009252000000000000000">
7.2.5.2 Complex Numbers as Python Objects
</A>
<dl><dt><b><tt class=
"ctype"><a id='l2h-
438' xml:id='l2h-
438'
>PyComplexObject
</a></tt></b></dt>
This subtype of
<tt class=
"ctype">PyObject
</tt> represents a Python complex number
<dl><dt>PyTypeObject
<b><tt id='l2h-
439' xml:id='l2h-
439'
class=
"cdata">PyComplex_Type
</tt></b></dt>
This instance of
<tt class=
"ctype">PyTypeObject
</tt> represents the Python complex
<dl><dt><table cellpadding=
"0" cellspacing=
"0"><tr valign=
"baseline"><td><nobr>int
<b><tt id='l2h-
440' xml:id='l2h-
440'
class=
"cfunction">PyComplex_Check
</tt></b>(
</nobr></td><td>PyObject *
<var>p
</var>)
</td></tr></table></dt>
Return true if its argument is a
<tt class=
"ctype">PyComplexObject
</tt> or a
subtype of
<tt class=
"ctype">PyComplexObject
</tt>.
<span class=
"versionnote">Changed in version
2.2:
Allowed subtypes to be accepted.
</span>
<dl><dt><table cellpadding=
"0" cellspacing=
"0"><tr valign=
"baseline"><td><nobr>int
<b><tt id='l2h-
441' xml:id='l2h-
441'
class=
"cfunction">PyComplex_CheckExact
</tt></b>(
</nobr></td><td>PyObject *
<var>p
</var>)
</td></tr></table></dt>
Return true if its argument is a
<tt class=
"ctype">PyComplexObject
</tt>, but not a
subtype of
<tt class=
"ctype">PyComplexObject
</tt>.
<span class=
"versionnote">New in version
2.2.
</span>
<dl><dt><table cellpadding=
"0" cellspacing=
"0"><tr valign=
"baseline"><td><nobr>PyObject*
<b><tt id='l2h-
442' xml:id='l2h-
442'
class=
"cfunction">PyComplex_FromCComplex
</tt></b>(
</nobr></td><td>Py_complex
<var>v
</var>)
</td></tr></table></dt>
<div class=
"refcount-info">
<span class=
"label">Return value:
</span>
<span class=
"value">New reference.
</span>
Create a new Python complex number object from a C
<tt class=
"ctype">Py_complex
</tt> value.
<dl><dt><table cellpadding=
"0" cellspacing=
"0"><tr valign=
"baseline"><td><nobr>PyObject*
<b><tt id='l2h-
443' xml:id='l2h-
443'
class=
"cfunction">PyComplex_FromDoubles
</tt></b>(
</nobr></td><td>double
<var>real
</var>, double
<var>imag
</var>)
</td></tr></table></dt>
<div class=
"refcount-info">
<span class=
"label">Return value:
</span>
<span class=
"value">New reference.
</span>
Return a new
<tt class=
"ctype">PyComplexObject
</tt> object from
<var>real
</var> and
<dl><dt><table cellpadding=
"0" cellspacing=
"0"><tr valign=
"baseline"><td><nobr>double
<b><tt id='l2h-
444' xml:id='l2h-
444'
class=
"cfunction">PyComplex_RealAsDouble
</tt></b>(
</nobr></td><td>PyObject *
<var>op
</var>)
</td></tr></table></dt>
Return the real part of
<var>op
</var> as a C
<tt class=
"ctype">double
</tt>.
<dl><dt><table cellpadding=
"0" cellspacing=
"0"><tr valign=
"baseline"><td><nobr>double
<b><tt id='l2h-
445' xml:id='l2h-
445'
class=
"cfunction">PyComplex_ImagAsDouble
</tt></b>(
</nobr></td><td>PyObject *
<var>op
</var>)
</td></tr></table></dt>
Return the imaginary part of
<var>op
</var> as a C
<tt class=
"ctype">double
</tt>.
<dl><dt><table cellpadding=
"0" cellspacing=
"0"><tr valign=
"baseline"><td><nobr>Py_complex
<b><tt id='l2h-
446' xml:id='l2h-
446'
class=
"cfunction">PyComplex_AsCComplex
</tt></b>(
</nobr></td><td>PyObject *
<var>op
</var>)
</td></tr></table></dt>
Return the
<tt class=
"ctype">Py_complex
</tt> value of the complex number
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<span class=
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2.4.2, documentation updated on
28 September
2005.
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