ef="sub_match.html" title="sub_match"><code class="computeroutput"><span class="identifier">sub_match</span></code></a> object representing the
        character sequence that matched the whole regular expression. If <span class="emphasis"><em>n</em></span>
        is out of range, or if <span class="emphasis"><em>n</em></span> is an unmatched sub-expression,
        then returns a <a class="link" href="sub_match.html" title="sub_match"><code class="computeroutput"><span class="identifier">sub_match</span><