CCF_100/python-project
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity
3946fb8ee6
python-project/python-3.7.4-docs-html/c-api/long.html

452 lines
44 KiB
HTML
Raw Normal View History

add files
2019-07-15 11:16:41 -05:00
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta charset="utf-8" />
<title>Integer Objects &#8212; Python 3.7.4 documentation</title>
<link rel="stylesheet" href="../_static/pydoctheme.css" type="text/css" />
<link rel="stylesheet" href="../_static/pygments.css" type="text/css" />
<script type="text/javascript" id="documentation_options" data-url_root="../" src="../_static/documentation_options.js"></script>
<script type="text/javascript" src="../_static/jquery.js"></script>
<script type="text/javascript" src="../_static/underscore.js"></script>
<script type="text/javascript" src="../_static/doctools.js"></script>
<script type="text/javascript" src="../_static/language_data.js"></script>
<script type="text/javascript" src="../_static/sidebar.js"></script>
<link rel="search" type="application/opensearchdescription+xml"
title="Search within Python 3.7.4 documentation"
href="../_static/opensearch.xml"/>
<link rel="author" title="About these documents" href="../about.html" />
<link rel="index" title="Index" href="../genindex.html" />
<link rel="search" title="Search" href="../search.html" />
<link rel="copyright" title="Copyright" href="../copyright.html" />
<link rel="next" title="Boolean Objects" href="bool.html" />
<link rel="prev" title="The None Object" href="none.html" />
<link rel="shortcut icon" type="image/png" href="../_static/py.png" />
<link rel="canonical" href="https://docs.python.org/3/c-api/long.html" />
<script type="text/javascript" src="../_static/copybutton.js"></script>
<script type="text/javascript" src="../_static/switchers.js"></script>
<style>
@media only screen {
table.full-width-table {
width: 100%;
}
}
</style>
</head><body>
<div class="related" role="navigation" aria-label="related navigation">
<h3>Navigation</h3>
<ul>
<li class="right" style="margin-right: 10px">
<a href="../genindex.html" title="General Index"
accesskey="I">index</a></li>
<li class="right" >
<a href="../py-modindex.html" title="Python Module Index"
>modules</a> |</li>
<li class="right" >
<a href="bool.html" title="Boolean Objects"
accesskey="N">next</a> |</li>
<li class="right" >
<a href="none.html" title="The None Object"
accesskey="P">previous</a> |</li>
<li><img src="../_static/py.png" alt=""
style="vertical-align: middle; margin-top: -1px"/></li>
<li><a href="https://www.python.org/">Python</a> &#187;</li>
<li>
<span class="language_switcher_placeholder">en</span>
<span class="version_switcher_placeholder">3.7.4</span>
<a href="../index.html">Documentation </a> &#187;
</li>
<li class="nav-item nav-item-1"><a href="index.html" >Python/C API Reference Manual</a> &#187;</li>
<li class="nav-item nav-item-2"><a href="concrete.html" accesskey="U">Concrete Objects Layer</a> &#187;</li>
<li class="right">
<div class="inline-search" style="display: none" role="search">
<form class="inline-search" action="../search.html" method="get">
<input placeholder="Quick search" type="text" name="q" />
<input type="submit" value="Go" />
<input type="hidden" name="check_keywords" value="yes" />
<input type="hidden" name="area" value="default" />
</form>
</div>
<script type="text/javascript">$('.inline-search').show(0);</script>
|
</li>
</ul>
</div>
<div class="document">
<div class="documentwrapper">
<div class="bodywrapper">
<div class="body" role="main">
<div class="section" id="integer-objects">
<span id="longobjects"></span><h1>Integer Objects<a class="headerlink" href="#integer-objects" title="Permalink to this headline"></a></h1>
<p id="index-0">All integers are implemented as “long” integer objects of arbitrary size.</p>
<p>On error, most <code class="docutils literal notranslate"><span class="pre">PyLong_As*</span></code> APIs return <code class="docutils literal notranslate"><span class="pre">(return</span> <span class="pre">type)-1</span></code> which cannot be
distinguished from a number. Use <a class="reference internal" href="exceptions.html#c.PyErr_Occurred" title="PyErr_Occurred"><code class="xref c c-func docutils literal notranslate"><span class="pre">PyErr_Occurred()</span></code></a> to disambiguate.</p>
<dl class="type">
<dt id="c.PyLongObject">
<code class="descname">PyLongObject</code><a class="headerlink" href="#c.PyLongObject" title="Permalink to this definition"></a></dt>
<dd><p>This subtype of <a class="reference internal" href="structures.html#c.PyObject" title="PyObject"><code class="xref c c-type docutils literal notranslate"><span class="pre">PyObject</span></code></a> represents a Python integer object.</p>
</dd></dl>
<dl class="var">
<dt id="c.PyLong_Type">
<a class="reference internal" href="type.html#c.PyTypeObject" title="PyTypeObject">PyTypeObject</a> <code class="descname">PyLong_Type</code><a class="headerlink" href="#c.PyLong_Type" title="Permalink to this definition"></a></dt>
<dd><p>This instance of <a class="reference internal" href="type.html#c.PyTypeObject" title="PyTypeObject"><code class="xref c c-type docutils literal notranslate"><span class="pre">PyTypeObject</span></code></a> represents the Python integer type.
This is the same object as <a class="reference internal" href="../library/functions.html#int" title="int"><code class="xref py py-class docutils literal notranslate"><span class="pre">int</span></code></a> in the Python layer.</p>
</dd></dl>
<dl class="function">
<dt id="c.PyLong_Check">
int <code class="descname">PyLong_Check</code><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *p</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyLong_Check" title="Permalink to this definition"></a></dt>
<dd><p>Return true if its argument is a <a class="reference internal" href="#c.PyLongObject" title="PyLongObject"><code class="xref c c-type docutils literal notranslate"><span class="pre">PyLongObject</span></code></a> or a subtype of
<a class="reference internal" href="#c.PyLongObject" title="PyLongObject"><code class="xref c c-type docutils literal notranslate"><span class="pre">PyLongObject</span></code></a>.</p>
</dd></dl>
<dl class="function">
<dt id="c.PyLong_CheckExact">
int <code class="descname">PyLong_CheckExact</code><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *p</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyLong_CheckExact" title="Permalink to this definition"></a></dt>
<dd><p>Return true if its argument is a <a class="reference internal" href="#c.PyLongObject" title="PyLongObject"><code class="xref c c-type docutils literal notranslate"><span class="pre">PyLongObject</span></code></a>, but not a subtype of
<a class="reference internal" href="#c.PyLongObject" title="PyLongObject"><code class="xref c c-type docutils literal notranslate"><span class="pre">PyLongObject</span></code></a>.</p>
</dd></dl>
<dl class="function">
<dt id="c.PyLong_FromLong">
<a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a>* <code class="descname">PyLong_FromLong</code><span class="sig-paren">(</span>long<em> v</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyLong_FromLong" title="Permalink to this definition"></a></dt>
<dd><em class="refcount">Return value: New reference.</em><p>Return a new <a class="reference internal" href="#c.PyLongObject" title="PyLongObject"><code class="xref c c-type docutils literal notranslate"><span class="pre">PyLongObject</span></code></a> object from <em>v</em>, or <em>NULL</em> on failure.</p>
<p>The current implementation keeps an array of integer objects for all integers
between <code class="docutils literal notranslate"><span class="pre">-5</span></code> and <code class="docutils literal notranslate"><span class="pre">256</span></code>, when you create an int in that range you actually
just get back a reference to the existing object. So it should be possible to
change the value of <code class="docutils literal notranslate"><span class="pre">1</span></code>. I suspect the behaviour of Python in this case is
undefined. :-)</p>
</dd></dl>
<dl class="function">
<dt id="c.PyLong_FromUnsignedLong">
<a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a>* <code class="descname">PyLong_FromUnsignedLong</code><span class="sig-paren">(</span>unsigned long<em> v</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyLong_FromUnsignedLong" title="Permalink to this definition"></a></dt>
<dd><em class="refcount">Return value: New reference.</em><p>Return a new <a class="reference internal" href="#c.PyLongObject" title="PyLongObject"><code class="xref c c-type docutils literal notranslate"><span class="pre">PyLongObject</span></code></a> object from a C <code class="xref c c-type docutils literal notranslate"><span class="pre">unsigned</span> <span class="pre">long</span></code>, or
<em>NULL</em> on failure.</p>
</dd></dl>
<dl class="function">
<dt id="c.PyLong_FromSsize_t">
<a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a>* <code class="descname">PyLong_FromSsize_t</code><span class="sig-paren">(</span>Py_ssize_t<em> v</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyLong_FromSsize_t" title="Permalink to this definition"></a></dt>
<dd><em class="refcount">Return value: New reference.</em><p>Return a new <a class="reference internal" href="#c.PyLongObject" title="PyLongObject"><code class="xref c c-type docutils literal notranslate"><span class="pre">PyLongObject</span></code></a> object from a C <code class="xref c c-type docutils literal notranslate"><span class="pre">Py_ssize_t</span></code>, or
<em>NULL</em> on failure.</p>
</dd></dl>
<dl class="function">
<dt id="c.PyLong_FromSize_t">
<a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a>* <code class="descname">PyLong_FromSize_t</code><span class="sig-paren">(</span>size_t<em> v</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyLong_FromSize_t" title="Permalink to this definition"></a></dt>
<dd><em class="refcount">Return value: New reference.</em><p>Return a new <a class="reference internal" href="#c.PyLongObject" title="PyLongObject"><code class="xref c c-type docutils literal notranslate"><span class="pre">PyLongObject</span></code></a> object from a C <code class="xref c c-type docutils literal notranslate"><span class="pre">size_t</span></code>, or
<em>NULL</em> on failure.</p>
</dd></dl>
<dl class="function">
<dt id="c.PyLong_FromLongLong">
<a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a>* <code class="descname">PyLong_FromLongLong</code><span class="sig-paren">(</span>long long<em> v</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyLong_FromLongLong" title="Permalink to this definition"></a></dt>
<dd><em class="refcount">Return value: New reference.</em><p>Return a new <a class="reference internal" href="#c.PyLongObject" title="PyLongObject"><code class="xref c c-type docutils literal notranslate"><span class="pre">PyLongObject</span></code></a> object from a C <code class="xref c c-type docutils literal notranslate"><span class="pre">long</span> <span class="pre">long</span></code>, or <em>NULL</em>
on failure.</p>
</dd></dl>
<dl class="function">
<dt id="c.PyLong_FromUnsignedLongLong">
<a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a>* <code class="descname">PyLong_FromUnsignedLongLong</code><span class="sig-paren">(</span>unsigned long long<em> v</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyLong_FromUnsignedLongLong" title="Permalink to this definition"></a></dt>
<dd><em class="refcount">Return value: New reference.</em><p>Return a new <a class="reference internal" href="#c.PyLongObject" title="PyLongObject"><code class="xref c c-type docutils literal notranslate"><span class="pre">PyLongObject</span></code></a> object from a C <code class="xref c c-type docutils literal notranslate"><span class="pre">unsigned</span> <span class="pre">long</span> <span class="pre">long</span></code>,
or <em>NULL</em> on failure.</p>
</dd></dl>
<dl class="function">
<dt id="c.PyLong_FromDouble">
<a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a>* <code class="descname">PyLong_FromDouble</code><span class="sig-paren">(</span>double<em> v</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyLong_FromDouble" title="Permalink to this definition"></a></dt>
<dd><em class="refcount">Return value: New reference.</em><p>Return a new <a class="reference internal" href="#c.PyLongObject" title="PyLongObject"><code class="xref c c-type docutils literal notranslate"><span class="pre">PyLongObject</span></code></a> object from the integer part of <em>v</em>, or
<em>NULL</em> on failure.</p>
</dd></dl>
<dl class="function">
<dt id="c.PyLong_FromString">
<a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a>* <code class="descname">PyLong_FromString</code><span class="sig-paren">(</span>const char<em> *str</em>, char<em> **pend</em>, int<em> base</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyLong_FromString" title="Permalink to this definition"></a></dt>
<dd><em class="refcount">Return value: New reference.</em><p>Return a new <a class="reference internal" href="#c.PyLongObject" title="PyLongObject"><code class="xref c c-type docutils literal notranslate"><span class="pre">PyLongObject</span></code></a> based on the string value in <em>str</em>, which
is interpreted according to the radix in <em>base</em>. If <em>pend</em> is non-<em>NULL</em>,
<em>*pend</em> will point to the first character in <em>str</em> which follows the
representation of the number. If <em>base</em> is <code class="docutils literal notranslate"><span class="pre">0</span></code>, <em>str</em> is interpreted using
the <a class="reference internal" href="../reference/lexical_analysis.html#integers"><span class="std std-ref">Integer literals</span></a> definition; in this case, leading zeros in a
non-zero decimal number raises a <a class="reference internal" href="../library/exceptions.html#ValueError" title="ValueError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">ValueError</span></code></a>. If <em>base</em> is not <code class="docutils literal notranslate"><span class="pre">0</span></code>,
it must be between <code class="docutils literal notranslate"><span class="pre">2</span></code> and <code class="docutils literal notranslate"><span class="pre">36</span></code>, inclusive. Leading spaces and single
underscores after a base specifier and between digits are ignored. If there
are no digits, <a class="reference internal" href="../library/exceptions.html#ValueError" title="ValueError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">ValueError</span></code></a> will be raised.</p>
</dd></dl>
<dl class="function">
<dt id="c.PyLong_FromUnicode">
<a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a>* <code class="descname">PyLong_FromUnicode</code><span class="sig-paren">(</span><a class="reference internal" href="unicode.html#c.Py_UNICODE" title="Py_UNICODE">Py_UNICODE</a><em> *u</em>, Py_ssize_t<em> length</em>, int<em> base</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyLong_FromUnicode" title="Permalink to this definition"></a></dt>
<dd><em class="refcount">Return value: New reference.</em><p>Convert a sequence of Unicode digits to a Python integer value. The Unicode
string is first encoded to a byte string using <code class="xref c c-func docutils literal notranslate"><span class="pre">PyUnicode_EncodeDecimal()</span></code>
and then converted using <a class="reference internal" href="#c.PyLong_FromString" title="PyLong_FromString"><code class="xref c c-func docutils literal notranslate"><span class="pre">PyLong_FromString()</span></code></a>.</p>
<div class="deprecated">
<p><span class="versionmodified">Deprecated since version 3.3, will be removed in version 4.0: </span>Part of the old-style <a class="reference internal" href="unicode.html#c.Py_UNICODE" title="Py_UNICODE"><code class="xref c c-type docutils literal notranslate"><span class="pre">Py_UNICODE</span></code></a> API; please migrate to using
<a class="reference internal" href="#c.PyLong_FromUnicodeObject" title="PyLong_FromUnicodeObject"><code class="xref c c-func docutils literal notranslate"><span class="pre">PyLong_FromUnicodeObject()</span></code></a>.</p>
</div>
</dd></dl>
<dl class="function">
<dt id="c.PyLong_FromUnicodeObject">
<a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a>* <code class="descname">PyLong_FromUnicodeObject</code><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *u</em>, int<em> base</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyLong_FromUnicodeObject" title="Permalink to this definition"></a></dt>
<dd><em class="refcount">Return value: New reference.</em><p>Convert a sequence of Unicode digits in the string <em>u</em> to a Python integer
value. The Unicode string is first encoded to a byte string using
<code class="xref c c-func docutils literal notranslate"><span class="pre">PyUnicode_EncodeDecimal()</span></code> and then converted using
<a class="reference internal" href="#c.PyLong_FromString" title="PyLong_FromString"><code class="xref c c-func docutils literal notranslate"><span class="pre">PyLong_FromString()</span></code></a>.</p>
<div class="versionadded">
<p><span class="versionmodified added">New in version 3.3.</span></p>
</div>
</dd></dl>
<dl class="function">
<dt id="c.PyLong_FromVoidPtr">
<a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a>* <code class="descname">PyLong_FromVoidPtr</code><span class="sig-paren">(</span>void<em> *p</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyLong_FromVoidPtr" title="Permalink to this definition"></a></dt>
<dd><em class="refcount">Return value: New reference.</em><p>Create a Python integer from the pointer <em>p</em>. The pointer value can be
retrieved from the resulting value using <a class="reference internal" href="#c.PyLong_AsVoidPtr" title="PyLong_AsVoidPtr"><code class="xref c c-func docutils literal notranslate"><span class="pre">PyLong_AsVoidPtr()</span></code></a>.</p>
</dd></dl>
<dl class="function">
<dt id="c.PyLong_AsLong">
long <code class="descname">PyLong_AsLong</code><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *obj</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyLong_AsLong" title="Permalink to this definition"></a></dt>
<dd><p id="index-1">Return a C <code class="xref c c-type docutils literal notranslate"><span class="pre">long</span></code> representation of <em>obj</em>. If <em>obj</em> is not an
instance of <a class="reference internal" href="#c.PyLongObject" title="PyLongObject"><code class="xref c c-type docutils literal notranslate"><span class="pre">PyLongObject</span></code></a>, first call its <a class="reference internal" href="../reference/datamodel.html#object.__int__" title="object.__int__"><code class="xref py py-meth docutils literal notranslate"><span class="pre">__int__()</span></code></a> method
(if present) to convert it to a <a class="reference internal" href="#c.PyLongObject" title="PyLongObject"><code class="xref c c-type docutils literal notranslate"><span class="pre">PyLongObject</span></code></a>.</p>
<p>Raise <a class="reference internal" href="../library/exceptions.html#OverflowError" title="OverflowError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">OverflowError</span></code></a> if the value of <em>obj</em> is out of range for a
<code class="xref c c-type docutils literal notranslate"><span class="pre">long</span></code>.</p>
<p>Returns <code class="docutils literal notranslate"><span class="pre">-1</span></code> on error. Use <a class="reference internal" href="exceptions.html#c.PyErr_Occurred" title="PyErr_Occurred"><code class="xref c c-func docutils literal notranslate"><span class="pre">PyErr_Occurred()</span></code></a> to disambiguate.</p>
</dd></dl>
<dl class="function">
<dt id="c.PyLong_AsLongAndOverflow">
long <code class="descname">PyLong_AsLongAndOverflow</code><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *obj</em>, int<em> *overflow</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyLong_AsLongAndOverflow" title="Permalink to this definition"></a></dt>
<dd><p>Return a C <code class="xref c c-type docutils literal notranslate"><span class="pre">long</span></code> representation of <em>obj</em>. If <em>obj</em> is not an
instance of <a class="reference internal" href="#c.PyLongObject" title="PyLongObject"><code class="xref c c-type docutils literal notranslate"><span class="pre">PyLongObject</span></code></a>, first call its <a class="reference internal" href="../reference/datamodel.html#object.__int__" title="object.__int__"><code class="xref py py-meth docutils literal notranslate"><span class="pre">__int__()</span></code></a> method
(if present) to convert it to a <a class="reference internal" href="#c.PyLongObject" title="PyLongObject"><code class="xref c c-type docutils literal notranslate"><span class="pre">PyLongObject</span></code></a>.</p>
<p>If the value of <em>obj</em> is greater than <code class="xref py py-const docutils literal notranslate"><span class="pre">LONG_MAX</span></code> or less than
<code class="xref py py-const docutils literal notranslate"><span class="pre">LONG_MIN</span></code>, set <em>*overflow</em> to <code class="docutils literal notranslate"><span class="pre">1</span></code> or <code class="docutils literal notranslate"><span class="pre">-1</span></code>, respectively, and
return <code class="docutils literal notranslate"><span class="pre">-1</span></code>; otherwise, set <em>*overflow</em> to <code class="docutils literal notranslate"><span class="pre">0</span></code>. If any other exception
occurs set <em>*overflow</em> to <code class="docutils literal notranslate"><span class="pre">0</span></code> and return <code class="docutils literal notranslate"><span class="pre">-1</span></code> as usual.</p>
<p>Returns <code class="docutils literal notranslate"><span class="pre">-1</span></code> on error. Use <a class="reference internal" href="exceptions.html#c.PyErr_Occurred" title="PyErr_Occurred"><code class="xref c c-func docutils literal notranslate"><span class="pre">PyErr_Occurred()</span></code></a> to disambiguate.</p>
</dd></dl>
<dl class="function">
<dt id="c.PyLong_AsLongLong">
long long <code class="descname">PyLong_AsLongLong</code><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *obj</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyLong_AsLongLong" title="Permalink to this definition"></a></dt>
<dd><p id="index-2">Return a C <code class="xref c c-type docutils literal notranslate"><span class="pre">long</span> <span class="pre">long</span></code> representation of <em>obj</em>. If <em>obj</em> is not an
instance of <a class="reference internal" href="#c.PyLongObject" title="PyLongObject"><code class="xref c c-type docutils literal notranslate"><span class="pre">PyLongObject</span></code></a>, first call its <a class="reference internal" href="../reference/datamodel.html#object.__int__" title="object.__int__"><code class="xref py py-meth docutils literal notranslate"><span class="pre">__int__()</span></code></a> method
(if present) to convert it to a <a class="reference internal" href="#c.PyLongObject" title="PyLongObject"><code class="xref c c-type docutils literal notranslate"><span class="pre">PyLongObject</span></code></a>.</p>
<p>Raise <a class="reference internal" href="../library/exceptions.html#OverflowError" title="OverflowError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">OverflowError</span></code></a> if the value of <em>obj</em> is out of range for a
<code class="xref c c-type docutils literal notranslate"><span class="pre">long</span></code>.</p>
<p>Returns <code class="docutils literal notranslate"><span class="pre">-1</span></code> on error. Use <a class="reference internal" href="exceptions.html#c.PyErr_Occurred" title="PyErr_Occurred"><code class="xref c c-func docutils literal notranslate"><span class="pre">PyErr_Occurred()</span></code></a> to disambiguate.</p>
</dd></dl>
<dl class="function">
<dt id="c.PyLong_AsLongLongAndOverflow">
long long <code class="descname">PyLong_AsLongLongAndOverflow</code><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *obj</em>, int<em> *overflow</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyLong_AsLongLongAndOverflow" title="Permalink to this definition"></a></dt>
<dd><p>Return a C <code class="xref c c-type docutils literal notranslate"><span class="pre">long</span> <span class="pre">long</span></code> representation of <em>obj</em>. If <em>obj</em> is not an
instance of <a class="reference internal" href="#c.PyLongObject" title="PyLongObject"><code class="xref c c-type docutils literal notranslate"><span class="pre">PyLongObject</span></code></a>, first call its <a class="reference internal" href="../reference/datamodel.html#object.__int__" title="object.__int__"><code class="xref py py-meth docutils literal notranslate"><span class="pre">__int__()</span></code></a> method
(if present) to convert it to a <a class="reference internal" href="#c.PyLongObject" title="PyLongObject"><code class="xref c c-type docutils literal notranslate"><span class="pre">PyLongObject</span></code></a>.</p>
<p>If the value of <em>obj</em> is greater than <code class="xref py py-const docutils literal notranslate"><span class="pre">PY_LLONG_MAX</span></code> or less than
<code class="xref py py-const docutils literal notranslate"><span class="pre">PY_LLONG_MIN</span></code>, set <em>*overflow</em> to <code class="docutils literal notranslate"><span class="pre">1</span></code> or <code class="docutils literal notranslate"><span class="pre">-1</span></code>, respectively,
and return <code class="docutils literal notranslate"><span class="pre">-1</span></code>; otherwise, set <em>*overflow</em> to <code class="docutils literal notranslate"><span class="pre">0</span></code>. If any other
exception occurs set <em>*overflow</em> to <code class="docutils literal notranslate"><span class="pre">0</span></code> and return <code class="docutils literal notranslate"><span class="pre">-1</span></code> as usual.</p>
<p>Returns <code class="docutils literal notranslate"><span class="pre">-1</span></code> on error. Use <a class="reference internal" href="exceptions.html#c.PyErr_Occurred" title="PyErr_Occurred"><code class="xref c c-func docutils literal notranslate"><span class="pre">PyErr_Occurred()</span></code></a> to disambiguate.</p>
<div class="versionadded">
<p><span class="versionmodified added">New in version 3.2.</span></p>
</div>
</dd></dl>
<dl class="function">
<dt id="c.PyLong_AsSsize_t">
Py_ssize_t <code class="descname">PyLong_AsSsize_t</code><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *pylong</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyLong_AsSsize_t" title="Permalink to this definition"></a></dt>
<dd><p id="index-3">Return a C <code class="xref c c-type docutils literal notranslate"><span class="pre">Py_ssize_t</span></code> representation of <em>pylong</em>. <em>pylong</em> must
be an instance of <a class="reference internal" href="#c.PyLongObject" title="PyLongObject"><code class="xref c c-type docutils literal notranslate"><span class="pre">PyLongObject</span></code></a>.</p>
<p>Raise <a class="reference internal" href="../library/exceptions.html#OverflowError" title="OverflowError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">OverflowError</span></code></a> if the value of <em>pylong</em> is out of range for a
<code class="xref c c-type docutils literal notranslate"><span class="pre">Py_ssize_t</span></code>.</p>
<p>Returns <code class="docutils literal notranslate"><span class="pre">-1</span></code> on error. Use <a class="reference internal" href="exceptions.html#c.PyErr_Occurred" title="PyErr_Occurred"><code class="xref c c-func docutils literal notranslate"><span class="pre">PyErr_Occurred()</span></code></a> to disambiguate.</p>
</dd></dl>
<dl class="function">
<dt id="c.PyLong_AsUnsignedLong">
unsigned long <code class="descname">PyLong_AsUnsignedLong</code><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *pylong</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyLong_AsUnsignedLong" title="Permalink to this definition"></a></dt>
<dd><p id="index-4">Return a C <code class="xref c c-type docutils literal notranslate"><span class="pre">unsigned</span> <span class="pre">long</span></code> representation of <em>pylong</em>. <em>pylong</em>
must be an instance of <a class="reference internal" href="#c.PyLongObject" title="PyLongObject"><code class="xref c c-type docutils literal notranslate"><span class="pre">PyLongObject</span></code></a>.</p>
<p>Raise <a class="reference internal" href="../library/exceptions.html#OverflowError" title="OverflowError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">OverflowError</span></code></a> if the value of <em>pylong</em> is out of range for a
<code class="xref c c-type docutils literal notranslate"><span class="pre">unsigned</span> <span class="pre">long</span></code>.</p>
<p>Returns <code class="docutils literal notranslate"><span class="pre">(unsigned</span> <span class="pre">long)-1</span></code> on error.
Use <a class="reference internal" href="exceptions.html#c.PyErr_Occurred" title="PyErr_Occurred"><code class="xref c c-func docutils literal notranslate"><span class="pre">PyErr_Occurred()</span></code></a> to disambiguate.</p>
</dd></dl>
<dl class="function">
<dt id="c.PyLong_AsSize_t">
size_t <code class="descname">PyLong_AsSize_t</code><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *pylong</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyLong_AsSize_t" title="Permalink to this definition"></a></dt>
<dd><p id="index-5">Return a C <code class="xref c c-type docutils literal notranslate"><span class="pre">size_t</span></code> representation of <em>pylong</em>. <em>pylong</em> must be
an instance of <a class="reference internal" href="#c.PyLongObject" title="PyLongObject"><code class="xref c c-type docutils literal notranslate"><span class="pre">PyLongObject</span></code></a>.</p>
<p>Raise <a class="reference internal" href="../library/exceptions.html#OverflowError" title="OverflowError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">OverflowError</span></code></a> if the value of <em>pylong</em> is out of range for a
<code class="xref c c-type docutils literal notranslate"><span class="pre">size_t</span></code>.</p>
<p>Returns <code class="docutils literal notranslate"><span class="pre">(size_t)-1</span></code> on error.
Use <a class="reference internal" href="exceptions.html#c.PyErr_Occurred" title="PyErr_Occurred"><code class="xref c c-func docutils literal notranslate"><span class="pre">PyErr_Occurred()</span></code></a> to disambiguate.</p>
</dd></dl>
<dl class="function">
<dt id="c.PyLong_AsUnsignedLongLong">
unsigned long long <code class="descname">PyLong_AsUnsignedLongLong</code><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *pylong</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyLong_AsUnsignedLongLong" title="Permalink to this definition"></a></dt>
<dd><p id="index-6">Return a C <code class="xref c c-type docutils literal notranslate"><span class="pre">unsigned</span> <span class="pre">long</span> <span class="pre">long</span></code> representation of <em>pylong</em>. <em>pylong</em>
must be an instance of <a class="reference internal" href="#c.PyLongObject" title="PyLongObject"><code class="xref c c-type docutils literal notranslate"><span class="pre">PyLongObject</span></code></a>.</p>
<p>Raise <a class="reference internal" href="../library/exceptions.html#OverflowError" title="OverflowError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">OverflowError</span></code></a> if the value of <em>pylong</em> is out of range for an
<code class="xref c c-type docutils literal notranslate"><span class="pre">unsigned</span> <span class="pre">long</span> <span class="pre">long</span></code>.</p>
<p>Returns <code class="docutils literal notranslate"><span class="pre">(unsigned</span> <span class="pre">long</span> <span class="pre">long)-1</span></code> on error.
Use <a class="reference internal" href="exceptions.html#c.PyErr_Occurred" title="PyErr_Occurred"><code class="xref c c-func docutils literal notranslate"><span class="pre">PyErr_Occurred()</span></code></a> to disambiguate.</p>
<div class="versionchanged">
<p><span class="versionmodified changed">Changed in version 3.1: </span>A negative <em>pylong</em> now raises <a class="reference internal" href="../library/exceptions.html#OverflowError" title="OverflowError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">OverflowError</span></code></a>, not <a class="reference internal" href="../library/exceptions.html#TypeError" title="TypeError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">TypeError</span></code></a>.</p>
</div>
</dd></dl>
<dl class="function">
<dt id="c.PyLong_AsUnsignedLongMask">
unsigned long <code class="descname">PyLong_AsUnsignedLongMask</code><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *obj</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyLong_AsUnsignedLongMask" title="Permalink to this definition"></a></dt>
<dd><p>Return a C <code class="xref c c-type docutils literal notranslate"><span class="pre">unsigned</span> <span class="pre">long</span></code> representation of <em>obj</em>. If <em>obj</em>
is not an instance of <a class="reference internal" href="#c.PyLongObject" title="PyLongObject"><code class="xref c c-type docutils literal notranslate"><span class="pre">PyLongObject</span></code></a>, first call its <a class="reference internal" href="../reference/datamodel.html#object.__int__" title="object.__int__"><code class="xref py py-meth docutils literal notranslate"><span class="pre">__int__()</span></code></a>
method (if present) to convert it to a <a class="reference internal" href="#c.PyLongObject" title="PyLongObject"><code class="xref c c-type docutils literal notranslate"><span class="pre">PyLongObject</span></code></a>.</p>
<p>If the value of <em>obj</em> is out of range for an <code class="xref c c-type docutils literal notranslate"><span class="pre">unsigned</span> <span class="pre">long</span></code>,
return the reduction of that value modulo <code class="docutils literal notranslate"><span class="pre">ULONG_MAX</span> <span class="pre">+</span> <span class="pre">1</span></code>.</p>
<p>Returns <code class="docutils literal notranslate"><span class="pre">(unsigned</span> <span class="pre">long)-1</span></code> on error. Use <a class="reference internal" href="exceptions.html#c.PyErr_Occurred" title="PyErr_Occurred"><code class="xref c c-func docutils literal notranslate"><span class="pre">PyErr_Occurred()</span></code></a> to
disambiguate.</p>
</dd></dl>
<dl class="function">
<dt id="c.PyLong_AsUnsignedLongLongMask">
unsigned long long <code class="descname">PyLong_AsUnsignedLongLongMask</code><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *obj</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyLong_AsUnsignedLongLongMask" title="Permalink to this definition"></a></dt>
<dd><p>Return a C <code class="xref c c-type docutils literal notranslate"><span class="pre">unsigned</span> <span class="pre">long</span> <span class="pre">long</span></code> representation of <em>obj</em>. If <em>obj</em>
is not an instance of <a class="reference internal" href="#c.PyLongObject" title="PyLongObject"><code class="xref c c-type docutils literal notranslate"><span class="pre">PyLongObject</span></code></a>, first call its <a class="reference internal" href="../reference/datamodel.html#object.__int__" title="object.__int__"><code class="xref py py-meth docutils literal notranslate"><span class="pre">__int__()</span></code></a>
method (if present) to convert it to a <a class="reference internal" href="#c.PyLongObject" title="PyLongObject"><code class="xref c c-type docutils literal notranslate"><span class="pre">PyLongObject</span></code></a>.</p>
<p>If the value of <em>obj</em> is out of range for an <code class="xref c c-type docutils literal notranslate"><span class="pre">unsigned</span> <span class="pre">long</span> <span class="pre">long</span></code>,
return the reduction of that value modulo <code class="docutils literal notranslate"><span class="pre">PY_ULLONG_MAX</span> <span class="pre">+</span> <span class="pre">1</span></code>.</p>
<p>Returns <code class="docutils literal notranslate"><span class="pre">(unsigned</span> <span class="pre">long</span> <span class="pre">long)-1</span></code> on error. Use <a class="reference internal" href="exceptions.html#c.PyErr_Occurred" title="PyErr_Occurred"><code class="xref c c-func docutils literal notranslate"><span class="pre">PyErr_Occurred()</span></code></a>
to disambiguate.</p>
</dd></dl>
<dl class="function">
<dt id="c.PyLong_AsDouble">
double <code class="descname">PyLong_AsDouble</code><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *pylong</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyLong_AsDouble" title="Permalink to this definition"></a></dt>
<dd><p>Return a C <code class="xref c c-type docutils literal notranslate"><span class="pre">double</span></code> representation of <em>pylong</em>. <em>pylong</em> must be
an instance of <a class="reference internal" href="#c.PyLongObject" title="PyLongObject"><code class="xref c c-type docutils literal notranslate"><span class="pre">PyLongObject</span></code></a>.</p>
<p>Raise <a class="reference internal" href="../library/exceptions.html#OverflowError" title="OverflowError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">OverflowError</span></code></a> if the value of <em>pylong</em> is out of range for a
<code class="xref c c-type docutils literal notranslate"><span class="pre">double</span></code>.</p>
<p>Returns <code class="docutils literal notranslate"><span class="pre">-1.0</span></code> on error. Use <a class="reference internal" href="exceptions.html#c.PyErr_Occurred" title="PyErr_Occurred"><code class="xref c c-func docutils literal notranslate"><span class="pre">PyErr_Occurred()</span></code></a> to disambiguate.</p>
</dd></dl>
<dl class="function">
<dt id="c.PyLong_AsVoidPtr">
void* <code class="descname">PyLong_AsVoidPtr</code><span class="sig-paren">(</span><a class="reference internal" href="structures.html#c.PyObject" title="PyObject">PyObject</a><em> *pylong</em><span class="sig-paren">)</span><a class="headerlink" href="#c.PyLong_AsVoidPtr" title="Permalink to this definition"></a></dt>
<dd><p>Convert a Python integer <em>pylong</em> to a C <code class="xref c c-type docutils literal notranslate"><span class="pre">void</span></code> pointer.
If <em>pylong</em> cannot be converted, an <a class="reference internal" href="../library/exceptions.html#OverflowError" title="OverflowError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">OverflowError</span></code></a> will be raised. This
is only assured to produce a usable <code class="xref c c-type docutils literal notranslate"><span class="pre">void</span></code> pointer for values created
with <a class="reference internal" href="#c.PyLong_FromVoidPtr" title="PyLong_FromVoidPtr"><code class="xref c c-func docutils literal notranslate"><span class="pre">PyLong_FromVoidPtr()</span></code></a>.</p>
<p>Returns <em>NULL</em> on error. Use <a class="reference internal" href="exceptions.html#c.PyErr_Occurred" title="PyErr_Occurred"><code class="xref c c-func docutils literal notranslate"><span class="pre">PyErr_Occurred()</span></code></a> to disambiguate.</p>
</dd></dl>
</div>
</div>
</div>
</div>
<div class="sphinxsidebar" role="navigation" aria-label="main navigation">
<div class="sphinxsidebarwrapper">
<h4>Previous topic</h4>
<p class="topless"><a href="none.html"
title="previous chapter">The <code class="docutils literal notranslate"><span class="pre">None</span></code> Object</a></p>
<h4>Next topic</h4>
<p class="topless"><a href="bool.html"
title="next chapter">Boolean Objects</a></p>
<div role="note" aria-label="source link">
<h3>This Page</h3>
<ul class="this-page-menu">
<li><a href="../bugs.html">Report a Bug</a></li>
<li>
<a href="https://github.com/python/cpython/blob/3.7/Doc/c-api/long.rst"
rel="nofollow">Show Source
</a>
</li>
</ul>
</div>
</div>
</div>
<div class="clearer"></div>
</div>
<div class="related" role="navigation" aria-label="related navigation">
<h3>Navigation</h3>
<ul>
<li class="right" style="margin-right: 10px">
<a href="../genindex.html" title="General Index"
>index</a></li>
<li class="right" >
<a href="../py-modindex.html" title="Python Module Index"
>modules</a> |</li>
<li class="right" >
<a href="bool.html" title="Boolean Objects"
>next</a> |</li>
<li class="right" >
<a href="none.html" title="The None Object"
>previous</a> |</li>
<li><img src="../_static/py.png" alt=""
style="vertical-align: middle; margin-top: -1px"/></li>
<li><a href="https://www.python.org/">Python</a> &#187;</li>
<li>
<span class="language_switcher_placeholder">en</span>
<span class="version_switcher_placeholder">3.7.4</span>
<a href="../index.html">Documentation </a> &#187;
</li>
<li class="nav-item nav-item-1"><a href="index.html" >Python/C API Reference Manual</a> &#187;</li>
<li class="nav-item nav-item-2"><a href="concrete.html" >Concrete Objects Layer</a> &#187;</li>
<li class="right">
<div class="inline-search" style="display: none" role="search">
<form class="inline-search" action="../search.html" method="get">
<input placeholder="Quick search" type="text" name="q" />
<input type="submit" value="Go" />
<input type="hidden" name="check_keywords" value="yes" />
<input type="hidden" name="area" value="default" />
</form>
</div>
<script type="text/javascript">$('.inline-search').show(0);</script>
|
</li>
</ul>
</div>
<div class="footer">
&copy; <a href="../copyright.html">Copyright</a> 2001-2019, Python Software Foundation.
<br />
The Python Software Foundation is a non-profit corporation.
<a href="https://www.python.org/psf/donations/">Please donate.</a>
<br />
Last updated on Jul 13, 2019.
<a href="../bugs.html">Found a bug</a>?
<br />
Created using <a href="http://sphinx.pocoo.org/">Sphinx</a> 2.0.1.
</div>
</body>
</html>
Reference in New Issue Copy Permalink