29 lines
1.1 KiB
Python
29 lines
1.1 KiB
Python
import re
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_country2length = dict(
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AL=28, AD=24, AT=20, AZ=28, BE=16, BH=22, BA=20, BR=29,
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BG=22, CR=21, HR=21, CY=28, CZ=24, DK=18, DO=28, EE=20,
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FO=18, FI=18, FR=27, GE=22, DE=22, GI=23, GR=27, GL=18,
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GT=28, HU=28, IS=26, IE=22, IL=23, IT=27, KZ=20, KW=30,
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LV=21, LB=28, LI=21, LT=20, LU=20, MK=19, MT=31, MR=27,
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MU=30, MC=27, MD=24, ME=22, NL=18, NO=15, PK=24, PS=29,
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PL=28, PT=25, RO=24, SM=27, SA=24, RS=22, SK=24, SI=19,
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ES=24, SE=24, CH=21, TN=24, TR=26, AE=23, GB=22, VG=24 )
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def valid_iban(iban):
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# Ensure upper alphanumeric input.
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iban = iban.replace(' ','').replace('\t','')
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if not re.match(r'^[\dA-Z]+$', iban):
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return False
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# Validate country code against expected length.
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if len(iban) != _country2length[iban[:2]]:
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return False
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# Shift and convert.
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iban = iban[4:] + iban[:4]
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digits = int(''.join(str(int(ch, 36)) for ch in iban)) #BASE 36: 0..9,A..Z -> 0..35
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return digits % 97 == 1
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if __name__ == '__main__':
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for account in ["GB82 WEST 1234 5698 7654 32", "GB82 TEST 1234 5698 7654 32"]:
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print('%s validation is: %s' % (account, valid_iban(account)))
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