projects / OpenSPARC-T2-SAM / blame
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| 16 | <title>14 Porting to Python 2.4</title> | |
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| 32 | <td align="center" width="100%">What's New in Python 2.4</td> | |
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| 52 | ||
| 53 | <H1><A NAME="SECTION0001500000000000000000"> | |
| 54 | 14 Porting to Python 2.4</A> | |
| 55 | </H1> | |
| 56 | ||
| 57 | <P> | |
| 58 | This section lists previously described changes that may require | |
| 59 | changes to your code: | |
| 60 | ||
| 61 | <P> | |
| 62 | ||
| 63 | <UL> | |
| 64 | <LI>Left shifts and hexadecimal/octal constants that are too | |
| 65 | large no longer trigger a <tt class="exception">FutureWarning</tt> and return | |
| 66 | a value limited to 32 or 64 bits; instead they return a long integer. | |
| 67 | ||
| 68 | <P> | |
| 69 | </LI> | |
| 70 | <LI>Integer operations will no longer trigger an <tt class="exception">OverflowWarning</tt>. | |
| 71 | The <tt class="exception">OverflowWarning</tt> warning will disappear in Python 2.5. | |
| 72 | ||
| 73 | <P> | |
| 74 | </LI> | |
| 75 | <LI>The <tt class="function">zip()</tt> built-in function and <tt class="function">itertools.izip()</tt> | |
| 76 | now return an empty list instead of raising a <tt class="exception">TypeError</tt> | |
| 77 | exception if called with no arguments. | |
| 78 | ||
| 79 | <P> | |
| 80 | </LI> | |
| 81 | <LI><tt class="function">dircache.listdir()</tt> now passes exceptions to the caller | |
| 82 | instead of returning empty lists. | |
| 83 | ||
| 84 | <P> | |
| 85 | </LI> | |
| 86 | <LI><tt class="function">LexicalHandler.startDTD()</tt> used to receive the public and | |
| 87 | system IDs in the wrong order. This has been corrected; applications | |
| 88 | relying on the wrong order need to be fixed. | |
| 89 | ||
| 90 | <P> | |
| 91 | </LI> | |
| 92 | <LI><tt class="function">fcntl.ioctl</tt> now warns if the <var>mutate</var> | |
| 93 | argument is omitted and relevant. | |
| 94 | ||
| 95 | <P> | |
| 96 | </LI> | |
| 97 | <LI>The <tt class="module">tarfile</tt> module now generates GNU-format tar files | |
| 98 | by default. | |
| 99 | ||
| 100 | <P> | |
| 101 | </LI> | |
| 102 | <LI>Encountering a failure while importing a module no longer leaves | |
| 103 | a partially-initialized module object in <code>sys.modules</code>. | |
| 104 | ||
| 105 | <P> | |
| 106 | </LI> | |
| 107 | <LI><tt class="constant">None</tt> is now a constant; code that binds a new value to | |
| 108 | the name "<tt class="samp">None</tt>" is now a syntax error. | |
| 109 | ||
| 110 | <P> | |
| 111 | </LI> | |
| 112 | </UL> | |
| 113 | ||
| 114 | <P> | |
| 115 | ||
| 116 | <DIV CLASS="navigation"> | |
| 117 | <div class='online-navigation'> | |
| 118 | <p></p><hr /> | |
| 119 | <table align="center" width="100%" cellpadding="0" cellspacing="2"> | |
| 120 | <tr> | |
| 121 | <td class='online-navigation'><a rel="prev" title="13 Build and C" | |
| 122 | href="node14.html"><img src='../icons/previous.png' | |
| 123 | border='0' height='32' alt='Previous Page' width='32' /></A></td> | |
| 124 | <td class='online-navigation'><a rel="parent" title="What's New in Python" | |
| 125 | href="whatsnew24.html"><img src='../icons/up.png' | |
| 126 | border='0' height='32' alt='Up One Level' width='32' /></A></td> | |
| 127 | <td class='online-navigation'><a rel="next" title="15 Acknowledgements" | |
| 128 | href="acks.html"><img src='../icons/next.png' | |
| 129 | border='0' height='32' alt='Next Page' width='32' /></A></td> | |
| 130 | <td align="center" width="100%">What's New in Python 2.4</td> | |
| 131 | <td class='online-navigation'><a rel="contents" title="Table of Contents" | |
| 132 | href="contents.html"><img src='../icons/contents.png' | |
| 133 | border='0' height='32' alt='Contents' width='32' /></A></td> | |
| 134 | <td class='online-navigation'><img src='../icons/blank.png' | |
| 135 | border='0' height='32' alt='' width='32' /></td> | |
| 136 | <td class='online-navigation'><img src='../icons/blank.png' | |
| 137 | border='0' height='32' alt='' width='32' /></td> | |
| 138 | </tr></table> | |
| 139 | <div class='online-navigation'> | |
| 140 | <b class="navlabel">Previous:</b> | |
| 141 | <a class="sectref" rel="prev" href="node14.html">13 Build and C</A> | |
| 142 | <b class="navlabel">Up:</b> | |
| 143 | <a class="sectref" rel="parent" href="whatsnew24.html">What's New in Python</A> | |
| 144 | <b class="navlabel">Next:</b> | |
| 145 | <a class="sectref" rel="next" href="acks.html">15 Acknowledgements</A> | |
| 146 | </div> | |
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| 149 | <span class="release-info">Release 1.01.</span> | |
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