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While matching an email address, after I match something like yasar@webmail, I want to capture one or more of (\.\w+)(what I am doing is a little bit more complicated, this is just an example), I tried adding (.\w+)+ , but it only captures last match. For example, [email protected] matches but only include .tr after yasar@webmail part, so I lost .something and .edu groups. Can I do this in Python regular expressions, or would you suggest matching everything at first, and split the subpatterns later?
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A repeat is an expression that is repeated an arbitrary number of times. An expression followed by '*' can be repeated any number of times, including zero. An expression followed by '+' can be repeated any number of times, but at least once.
made this to find all with multiple #regular #expressions. regex1 = r"your regex here" regex2 = r"your regex here" regex3 = r"your regex here" regexList = [regex1, regex1, regex3] for x in regexList: if re. findall(x, your string): some_list = re. findall(x, your string) for y in some_list: found_regex_list.
capturing in regexps means indicating that you're interested not only in matching (which is finding strings of characters that match your regular expression), but you're also interested in using specific parts of the matched string later on.
Introduction to the Python regex backreferences The backreferences allow you to reference capturing groups within a regular expression. In this syntax, N can be 1, 2, 3, etc. that represents the corresponding capturing group. Note that the \g<0> refer to the entire match, which has the same value as the match.
re module doesn't support repeated captures (regex supports it):
>>> m = regex.match(r'([.\w]+)@((\w+)(\.\w+)+)', '[email protected]') >>> m.groups() ('yasar', 'webmail.something.edu.tr', 'webmail', '.tr') >>> m.captures(4) ['.something', '.edu', '.tr'] In your case I'd go with splitting the repeated subpatterns later. It leads to a simple and readable code e.g., see the code in @Li-aung Yip's answer.
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