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Python - Find out number of groups in the regex expression

Python
regex

Posted at 2014-09-10

Ref:

[1] Stackoverflow - Find out number of capture groups in Python regular expressions

import re

def num_groups(regex):
    return re.compile(regex).groups

some_regex_str = 'miehaha_([A-Za-z0-9_-]+)'
print num_groups(some_regex_str)  # output: 1

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