<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <html> <head> <title>7.2.1 Plain Integer Objects </title> <META NAME="description" CONTENT="7.2.1 Plain Integer Objects "> <META NAME="keywords" CONTENT="api"> <META NAME="resource-type" CONTENT="document"> <META NAME="distribution" CONTENT="global"> <meta http-equiv="Content-Type" content="text/html; charset="> <link rel="STYLESHEET" href="api.css"> <link rel="first" href="api.html"> <link rel="contents" href="contents.html" title="Contents"> <link rel="index" href="genindex.html" title="Index"> <LINK REL="next" href="longObjects.html"> <LINK REL="previous" href="numericObjects.html"> <LINK REL="up" href="numericObjects.html"> <LINK REL="next" href="longObjects.html"> </head> <body> <DIV CLASS="navigation"> <table align="center" width="100%" cellpadding="0" cellspacing="2"> <tr> <td><A href="numericObjects.html"><img src="../icons/previous.gif" border="0" height="32" alt="Previous Page" width="32"></A></td> <td><A href="numericObjects.html"><img src="../icons/up.gif" border="0" height="32" alt="Up One Level" width="32"></A></td> <td><A href="longObjects.html"><img src="../icons/next.gif" border="0" height="32" alt="Next Page" width="32"></A></td> <td align="center" width="100%">Python/C API Reference Manual</td> <td><A href="contents.html"><img src="../icons/contents.gif" border="0" height="32" alt="Contents" width="32"></A></td> <td><img src="../icons/blank.gif" border="0" height="32" alt="" width="32"></td> <td><A href="genindex.html"><img src="../icons/index.gif" border="0" height="32" alt="Index" width="32"></A></td> </tr></table> <b class="navlabel">Previous:</b> <a class="sectref" href="numericObjects.html">7.2 Numeric Objects</A> <b class="navlabel">Up:</b> <a class="sectref" href="numericObjects.html">7.2 Numeric Objects</A> <b class="navlabel">Next:</b> <a class="sectref" href="longObjects.html">7.2.2 Long Integer Objects</A> <br><hr> </DIV> <!--End of Navigation Panel--> <H2><A NAME="SECTION009210000000000000000"> </A> <BR> 7.2.1 Plain Integer Objects </H2> <P> <a name="l2h-303"> </a><dl><dt><b><tt class="ctype"><a name="l2h-293">PyIntObject</a></tt></b> <dd> This subtype of <tt class="ctype">PyObject</tt> represents a Python integer object. </dl> <P> <dl><dt>PyTypeObject <b><a name="l2h-294"><tt class="cdata">PyInt_Type</tt></a></b> <dd> This instance of <tt class="ctype">PyTypeObject</tt> represents the Python plain integer type. This is the same object as <code>types.IntType</code>. <a name="l2h-296"> </a></dl> <P> <dl><dt>int <b><a name="l2h-297"><tt class="cfunction">PyInt_Check</tt></a></b>(<var>PyObject* o</var>) <dd> Returns true if <var>o</var> is of type <tt class="cdata">PyInt_Type</tt> or a subtype of <tt class="cdata">PyInt_Type</tt>. <span class="versionnote">Changed in version 2.2: Allowed subtypes to be accepted.</span> </dl> <P> <dl><dt>int <b><a name="l2h-298"><tt class="cfunction">PyInt_CheckExact</tt></a></b>(<var>PyObject* o</var>) <dd> Returns true if <var>o</var> is of type <tt class="cdata">PyInt_Type</tt>, but not a subtype of <tt class="cdata">PyInt_Type</tt>. <span class="versionnote">New in version 2.2.</span> </dl> <P> <dl><dt>PyObject* <b><a name="l2h-299"><tt class="cfunction">PyInt_FromLong</tt></a></b>(<var>long ival</var>) <dd> <div class="refcount-info"> <span class="label">Return value:</span> <span class="value">New reference.</span> </div> Creates a new integer object with a value of <var>ival</var>. <P> The current implementation keeps an array of integer objects for all integers between <code>-1</code> and <code>100</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>1</code>. I suspect the behaviour of Python in this case is undefined. :-) </dl> <P> <dl><dt>long <b><a name="l2h-300"><tt class="cfunction">PyInt_AsLong</tt></a></b>(<var>PyObject *io</var>) <dd> Will first attempt to cast the object to a <tt class="ctype">PyIntObject</tt>, if it is not already one, and then return its value. </dl> <P> <dl><dt>long <b><a name="l2h-301"><tt class="cfunction">PyInt_AS_LONG</tt></a></b>(<var>PyObject *io</var>) <dd> Returns the value of the object <var>io</var>. No error checking is performed. </dl> <P> <dl><dt>long <b><a name="l2h-302"><tt class="cfunction">PyInt_GetMax</tt></a></b>() <dd> Returns the system's idea of the largest integer it can handle (<tt class="constant">LONG_MAX</tt><a name="l2h-304"> </a> as defined in the system header files). </dl> <P> <DIV CLASS="navigation"> <p><hr> <table align="center" width="100%" cellpadding="0" cellspacing="2"> <tr> <td><A href="numericObjects.html"><img src="../icons/previous.gif" border="0" height="32" alt="Previous Page" width="32"></A></td> <td><A href="numericObjects.html"><img src="../icons/up.gif" border="0" height="32" alt="Up One Level" width="32"></A></td> <td><A href="longObjects.html"><img src="../icons/next.gif" border="0" height="32" alt="Next Page" width="32"></A></td> <td align="center" width="100%">Python/C API Reference Manual</td> <td><A href="contents.html"><img src="../icons/contents.gif" border="0" height="32" alt="Contents" width="32"></A></td> <td><img src="../icons/blank.gif" border="0" height="32" alt="" width="32"></td> <td><A href="genindex.html"><img src="../icons/index.gif" border="0" height="32" alt="Index" width="32"></A></td> </tr></table> <b class="navlabel">Previous:</b> <a class="sectref" href="numericObjects.html">7.2 Numeric Objects</A> <b class="navlabel">Up:</b> <a class="sectref" href="numericObjects.html">7.2 Numeric Objects</A> <b class="navlabel">Next:</b> <a class="sectref" href="longObjects.html">7.2.2 Long Integer Objects</A> <hr> <span class="release-info">Release 2.2, documentation updated on December 21, 2001.</span> </DIV> <!--End of Navigation Panel--> <ADDRESS> See <i><a href="about.html">About this document...</a></i> for information on suggesting changes. </ADDRESS> </BODY> </HTML>
