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| 55 | <H3><A NAME="SECTION0082132000000000000000"></A><A NAME="optparse-populating-parser"></A> | |
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| 57 | 6.21.3.2 Populating the parser | |
| 58 | </H3> | |
| 59 | ||
| 60 | <P> | |
| 61 | There are several ways to populate the parser with options. The | |
| 62 | preferred way is by using <code>OptionParser.add_option()</code>, as shown in | |
| 63 | section <A href="optparse-tutorial.html#optparse-tutorial">6.21.2</A>, the tutorial. <tt class="method">add_option()</tt> can be called in one of two | |
| 64 | ways: | |
| 65 | ||
| 66 | <UL> | |
| 67 | <LI> | |
| 68 | pass it an Option instance (as returned by <tt class="function">make_option()</tt>) | |
| 69 | ||
| 70 | <P> | |
| 71 | </LI> | |
| 72 | <LI> | |
| 73 | pass it any combination of positional and keyword arguments that are | |
| 74 | acceptable to <tt class="function">make_option()</tt> (i.e., to the Option constructor), | |
| 75 | and it will create the Option instance for you | |
| 76 | ||
| 77 | <P> | |
| 78 | </LI> | |
| 79 | </UL> | |
| 80 | ||
| 81 | <P> | |
| 82 | The other alternative is to pass a list of pre-constructed Option | |
| 83 | instances to the OptionParser constructor, as in: | |
| 84 | <div class="verbatim"><pre> | |
| 85 | option_list = [ | |
| 86 | make_option("-f", "--filename", | |
| 87 | action="store", type="string", dest="filename"), | |
| 88 | make_option("-q", "--quiet", | |
| 89 | action="store_false", dest="verbose"), | |
| 90 | ] | |
| 91 | parser = OptionParser(option_list=option_list) | |
| 92 | </pre></div> | |
| 93 | ||
| 94 | <P> | |
| 95 | (<tt class="function">make_option()</tt> is a factory function for creating Option instances; | |
| 96 | currently it is an alias for the Option constructor. A future version | |
| 97 | of <tt class="module">optparse</tt> may split Option into several classes, and <tt class="function">make_option()</tt> | |
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