<li><strong>Argument 'new' can be a function that accepts a match and returns a string.</strong></li>
<li><strong>Argument 'new' can be a function that accepts a match object and returns a string.</strong></li>
<li><strong>Search() and match() return None if they can't find a match.</strong></li>
<li><strong>Argument <codeclass="python hljs"><spanclass="hljs-string">'flags=re.IGNORECASE'</span></code> can be used with all functions.</strong></li>
<li><strong>Argument <codeclass="python hljs"><spanclass="hljs-string">'flags=re.MULTILINE'</span></code> makes <codeclass="python hljs"><spanclass="hljs-string">'^'</span></code> and <codeclass="python hljs"><spanclass="hljs-string">'$'</span></code> match the start/end of each line.</strong></li>