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\1 can be used inside of the lookahead even if the group is declared outside of it, wich enhance visibility and compehensiveness in that case.
regex_integer_in_range = r"^[1-9]{1}[0-9]{5}$" regex_alternating_repetitive_digit_pair = r"(.)(?=.\1)" import re P = input() print (bool(re.match(regex_integer_in_range, P)) and len(re.findall(regex_alternating_repetitive_digit_pair, P)) < 2)
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Validating Postal Codes
You are viewing a single comment's thread. Return to all comments →
\1 can be used inside of the lookahead even if the group is declared outside of it, wich enhance visibility and compehensiveness in that case.