If you need to analyze the match to extract information about specific group captures, for instance, you can pass a function to the string argument. more info here.
to capture a match between start and the first occurrence of end. Notice how the subexpression with nested parentheses spells out a number of alternatives which between them allow e only if it isn't followed by nd and so forth, and also take care to cover the empty string as one alternative which doesn't match whatever is disallowed at that ...
Answer (line anchors vs string anchors) What this tells me is that re.match and re.fullmatch don't match line anchors ^ and $ respectively, but that they instead match string anchors \A and \Z respectively.
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For example, 'Find' and 'F' are both matches for lettersPattern, since the number of letters for a match is not specified. But strfind matches 'F' first and returns its index.
While writing this answer, I had to match exclusively on linebreaks instead of using the s -flag (dotall - dot matches linebreaks). The sites usually used to test regular expressions behave differently when trying to match on \n or \r\n.
How can I create a regex NOT to match something? For example I want to regex to match everything that is NOT the string "www.petroules.com". I tried [^www\.petroules\.com] but that didn't seem to ...
