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17<title>6.21.2.1 Understanding option actions</title>
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55<H3><A NAME="SECTION0082121000000000000000"></A><A NAME="optparse-understanding-option-actions"></A>
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576.21.2.1 Understanding option actions
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60<P>
61Actions tell <tt class="module">optparse</tt> what to do when it encounters an option on the
62command line. There is a fixed set of actions hard-coded into <tt class="module">optparse</tt>;
63adding new actions is an advanced topic covered in section&nbsp;<A HREF="#optparse-extending"><tex2html_cross_ref_visible_mark></A>, Extending <tt class="module">optparse</tt>.
64Most actions tell <tt class="module">optparse</tt> to store a value in some variable--for
65example, take a string from the command line and store it in an
66attribute of <code>options</code>.
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69If you don't specify an option action, <tt class="module">optparse</tt> defaults to <code>store</code>.
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