the parser early.  That&#8217;s why parse_options() errors out if
both options are set.</p>
</dd>
<dt class="hdlist1"><code>PARSE_OPT_NO_INTERNAL_HELP</code></dt>
<dd>
<p>By default, parse_options() handles <code>-h</code>, <code>--help</code> and
<code>--help-all</code> internally, by showing a help screen.  This option
turns it off and allows one to add custom handlers for these
options, or to just leave them unknown.</p>
</dd>
</dl>
</div>
</li>
</ol>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_dat