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  1. Prepare
  2. Python
  3. Regex and Parsing
  4. Validating Postal Codes
  5. Discussions

Validating Postal Codes

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312 Discussions

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  • loucifsk
     + 0 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.

    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)

  • rejin_gunasekar1
     + 0 comments
    regex_integer_in_range = r"^[1-9]\d{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)

  • rodia_dz
     + 0 comments
    regex_integer_in_range = r"^[0-9]{6}$"
regex_alternating_repetitive_digit_pair = r"([0-9]{1})(?=[0-9]{1}\1)"

  • phanduy270104
     + 0 comments
    regex_integer_in_range = r"^[100000-999999]{6}$"	# Do not delete 'r'.

# Not more than one ARD pair
regex_alternating_repetitive_digit_pair = r"(\d)(?=\d\1)"	# Do not delete 'r'.

'''
source: StackOverflow

Explanation:

(\d): Match and capture a digit in group #1

(?=: Start lookahead

\d: Match any digit

\1: Back-reference to captured group #1

): End lookahead
'''


import re
P = input()

print (bool(re.match(regex_integer_in_range, P)) 
and len(re.findall(regex_alternating_repetitive_digit_pair, P)) < 2)

  • solders_array0m
     + 1 comment
    regex_integer_in_range = r"^[1-9]\d{5}$"	# Do not delete 'r'.
regex_alternating_repetitive_digit_pair = r"(?=(.).\1)"	# Do not delete 'r'.