Data commit

Task/IBAN/Python/iban.py

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