<li><strong>Argument <codeclass="python hljs"><spanclass="hljs-string">'flags=re.DOTALL'</span></code> makes <codeclass="python hljs"><spanclass="hljs-string">'.'</span></code> also accept the <codeclass="python hljs"><spanclass="hljs-string">'\n'</span></code>.</strong></li>
<li><strong>Use <codeclass="python hljs"><spanclass="hljs-string">r'\1'</span></code> or <codeclass="python hljs"><spanclass="hljs-string">'\\1'</span></code> for backreference (<codeclass="python hljs"><spanclass="hljs-string">'\1'</span></code> returns a character with octal code 1).</strong></li>
<li><strong>Add <codeclass="python hljs"><spanclass="hljs-string">'?'</span></code> after <codeclass="python hljs"><spanclass="hljs-string">'*'</span></code> and <codeclass="python hljs"><spanclass="hljs-string">'+'</span></code> to make them non-greedy.</strong></li>
<li><strong><codeclass="python hljs"><spanclass="hljs-string">'re.compile(<regex>)'</span></code> returns a Pattern object with listed functions.</strong></li>
<li><strong><codeclass="python hljs"><spanclass="hljs-string">'re.compile(<regex>)'</span></code> returns a Pattern object with methods sub(), findall(), …</strong></li>
</ul>
<div><h3id="matchobject">Match Object</h3><pre><codeclass="python language-python hljs"><str> = <Match>.group() <spanclass="hljs-comment"># Returns the whole match. Also group(0).</span>
<str> = <Match>.group(<spanclass="hljs-number">1</span>) <spanclass="hljs-comment"># Returns part inside the first brackets.</span>
Jure Šorn
1 year ago