projects / OpenSPARC-T2-SAM / blame
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| 53 | <H1><A NAME="SECTION00102500000000000000000"> | |
| 54 | 10.25 <tt class="module">distutils.cmd</tt> -- Abstract base class for Distutils commands</A> | |
| 55 | </H1> | |
| 56 | <A NAME="module-distutils.cmd"></A> | |
| 57 | ||
| 58 | <P> | |
| 59 | This module supplies the abstract base class <tt class="class">Command</tt>. | |
| 60 | ||
| 61 | <P> | |
| 62 | <dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline"> | |
| 63 | <td><nobr><b><span class="typelabel">class</span> <tt id='l2h-127' xml:id='l2h-127' class="class">Command</tt></b>(</nobr></td> | |
| 64 | <td><var>dist</var>)</td></tr></table></dt> | |
| 65 | <dd> | |
| 66 | Abstract base class for defining command classes, the ``worker bees'' | |
| 67 | of the Distutils. A useful analogy for command classes is to think of | |
| 68 | them as subroutines with local variables called <var>options</var>. The | |
| 69 | options are declared in <tt class="method">initialize_options()</tt> and defined | |
| 70 | (given their final values) in <tt class="method">finalize_options()</tt>, both of | |
| 71 | which must be defined by every command class. The distinction between | |
| 72 | the two is necessary because option values might come from the outside | |
| 73 | world (command line, config file, ...), and any options dependent on | |
| 74 | other options must be computed after these outside influences have | |
| 75 | been processed -- hence <tt class="method">finalize_options()</tt>. The body of the | |
| 76 | subroutine, where it does all its work based on the values of its | |
| 77 | options, is the <tt class="method">run()</tt> method, which must also be implemented | |
| 78 | by every command class. | |
| 79 | ||
| 80 | <P> | |
| 81 | The class constructor takes a single argument <var>dist</var>, a | |
| 82 | <tt class="class">Distribution</tt> instance. | |
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| 120 | <span class="release-info">Release 2.4.2, documentation updated on 28 September 2005.</span> | |
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