projects / OpenSPARC-T2-DV / blame
| Commit | Line | Data |
|---|---|---|
| 86530b38 AT |
1 | <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> |
| 2 | <html> | |
| 3 | <head> | |
| 4 | <link rel="STYLESHEET" href="whatsnew24.css" type='text/css' /> | |
| 5 | <link rel="SHORTCUT ICON" href="../icons/pyfav.png" type="image/png" /> | |
| 6 | <link rel='start' href='../index.html' title='Python Documentation Index' /> | |
| 7 | <link rel="first" href="whatsnew24.html" title='What's New in Python 2.4' /> | |
| 8 | <link rel='contents' href='contents.html' title="Contents" /> | |
| 9 | <link rel='last' href='about.html' title='About this document...' /> | |
| 10 | <link rel='help' href='about.html' title='About this document...' /> | |
| 11 | <link rel="next" href="node4.html" /> | |
| 12 | <link rel="prev" href="node2.html" /> | |
| 13 | <link rel="parent" href="whatsnew24.html" /> | |
| 14 | <link rel="next" href="node4.html" /> | |
| 15 | <meta name='aesop' content='information' /> | |
| 16 | <title>2 PEP 237: Unifying Long Integers and Integers</title> | |
| 17 | </head> | |
| 18 | <body> | |
| 19 | <DIV CLASS="navigation"> | |
| 20 | <div id='top-navigation-panel' xml:id='top-navigation-panel'> | |
| 21 | <table align="center" width="100%" cellpadding="0" cellspacing="2"> | |
| 22 | <tr> | |
| 23 | <td class='online-navigation'><a rel="prev" title="1 PEP 218: Built-In" | |
| 24 | href="node2.html"><img src='../icons/previous.png' | |
| 25 | border='0' height='32' alt='Previous Page' width='32' /></A></td> | |
| 26 | <td class='online-navigation'><a rel="parent" title="What's New in Python" | |
| 27 | href="whatsnew24.html"><img src='../icons/up.png' | |
| 28 | border='0' height='32' alt='Up One Level' width='32' /></A></td> | |
| 29 | <td class='online-navigation'><a rel="next" title="3 PEP 289: Generator" | |
| 30 | href="node4.html"><img src='../icons/next.png' | |
| 31 | border='0' height='32' alt='Next Page' width='32' /></A></td> | |
| 32 | <td align="center" width="100%">What's New in Python 2.4</td> | |
| 33 | <td class='online-navigation'><a rel="contents" title="Table of Contents" | |
| 34 | href="contents.html"><img src='../icons/contents.png' | |
| 35 | border='0' height='32' alt='Contents' width='32' /></A></td> | |
| 36 | <td class='online-navigation'><img src='../icons/blank.png' | |
| 37 | border='0' height='32' alt='' width='32' /></td> | |
| 38 | <td class='online-navigation'><img src='../icons/blank.png' | |
| 39 | border='0' height='32' alt='' width='32' /></td> | |
| 40 | </tr></table> | |
| 41 | <div class='online-navigation'> | |
| 42 | <b class="navlabel">Previous:</b> | |
| 43 | <a class="sectref" rel="prev" href="node2.html">1 PEP 218: Built-In</A> | |
| 44 | <b class="navlabel">Up:</b> | |
| 45 | <a class="sectref" rel="parent" href="whatsnew24.html">What's New in Python</A> | |
| 46 | <b class="navlabel">Next:</b> | |
| 47 | <a class="sectref" rel="next" href="node4.html">3 PEP 289: Generator</A> | |
| 48 | </div> | |
| 49 | <hr /></div> | |
| 50 | </DIV> | |
| 51 | <!--End of Navigation Panel--> | |
| 52 | ||
| 53 | <H1><A NAME="SECTION000300000000000000000"> | |
| 54 | 2 PEP 237: Unifying Long Integers and Integers</A> | |
| 55 | </H1> | |
| 56 | ||
| 57 | <P> | |
| 58 | The lengthy transition process for this PEP, begun in Python 2.2, | |
| 59 | takes another step forward in Python 2.4. In 2.3, certain integer | |
| 60 | operations that would behave differently after int/long unification | |
| 61 | triggered <tt class="exception">FutureWarning</tt> warnings and returned values | |
| 62 | limited to 32 or 64 bits (depending on your platform). In 2.4, these | |
| 63 | expressions no longer produce a warning and instead produce a | |
| 64 | different result that's usually a long integer. | |
| 65 | ||
| 66 | <P> | |
| 67 | The problematic expressions are primarily left shifts and lengthy | |
| 68 | hexadecimal and octal constants. For example, | |
| 69 | <code>2 << 32</code> results | |
| 70 | in a warning in 2.3, evaluating to 0 on 32-bit platforms. In Python | |
| 71 | 2.4, this expression now returns the correct answer, 8589934592. | |
| 72 | ||
| 73 | <P> | |
| 74 | <div class="seealso"> | |
| 75 | <p class="heading">See Also:</p> | |
| 76 | ||
| 77 | <dl compact="compact" class="seerfc"> | |
| 78 | <dt><a href="http://www.python.org/peps/pep-0237.html" | |
| 79 | title="Unifying Long Integers and Integers" | |
| 80 | >PEP 237, <em>Unifying Long Integers and Integers</em></a> | |
| 81 | <dd>Original PEP | |
| 82 | written by Moshe Zadka and GvR. The changes for 2.4 were implemented by | |
| 83 | Kalle Svensson. | |
| 84 | </dl> | |
| 85 | </div> | |
| 86 | ||
| 87 | <P> | |
| 88 | ||
| 89 | <DIV CLASS="navigation"> | |
| 90 | <div class='online-navigation'> | |
| 91 | <p></p><hr /> | |
| 92 | <table align="center" width="100%" cellpadding="0" cellspacing="2"> | |
| 93 | <tr> | |
| 94 | <td class='online-navigation'><a rel="prev" title="1 PEP 218: Built-In" | |
| 95 | href="node2.html"><img src='../icons/previous.png' | |
| 96 | border='0' height='32' alt='Previous Page' width='32' /></A></td> | |
| 97 | <td class='online-navigation'><a rel="parent" title="What's New in Python" | |
| 98 | href="whatsnew24.html"><img src='../icons/up.png' | |
| 99 | border='0' height='32' alt='Up One Level' width='32' /></A></td> | |
| 100 | <td class='online-navigation'><a rel="next" title="3 PEP 289: Generator" | |
| 101 | href="node4.html"><img src='../icons/next.png' | |
| 102 | border='0' height='32' alt='Next Page' width='32' /></A></td> | |
| 103 | <td align="center" width="100%">What's New in Python 2.4</td> | |
| 104 | <td class='online-navigation'><a rel="contents" title="Table of Contents" | |
| 105 | href="contents.html"><img src='../icons/contents.png' | |
| 106 | border='0' height='32' alt='Contents' width='32' /></A></td> | |
| 107 | <td class='online-navigation'><img src='../icons/blank.png' | |
| 108 | border='0' height='32' alt='' width='32' /></td> | |
| 109 | <td class='online-navigation'><img src='../icons/blank.png' | |
| 110 | border='0' height='32' alt='' width='32' /></td> | |
| 111 | </tr></table> | |
| 112 | <div class='online-navigation'> | |
| 113 | <b class="navlabel">Previous:</b> | |
| 114 | <a class="sectref" rel="prev" href="node2.html">1 PEP 218: Built-In</A> | |
| 115 | <b class="navlabel">Up:</b> | |
| 116 | <a class="sectref" rel="parent" href="whatsnew24.html">What's New in Python</A> | |
| 117 | <b class="navlabel">Next:</b> | |
| 118 | <a class="sectref" rel="next" href="node4.html">3 PEP 289: Generator</A> | |
| 119 | </div> | |
| 120 | </div> | |
| 121 | <hr /> | |
| 122 | <span class="release-info">Release 1.01.</span> | |
| 123 | </DIV> | |
| 124 | <!--End of Navigation Panel--> | |
| 125 | <ADDRESS> | |
| 126 | See <i><a href="about.html">About this document...</a></i> for information on suggesting changes. | |
| 127 | </ADDRESS> | |
| 128 | </BODY> | |
| 129 | </HTML> |