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Check validity of Singapore NRIC number
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""" This module has utility methods related to Singapore NRIC number""" | |
def check_nric_sg(nric): | |
""" check if a nric is valid or not""" | |
list_m = [2, 7, 6, 5, 4, 3, 2] | |
list_st = list('JZIHGFEDCBA') | |
list_fg = list('XWUTRQPNMLK') | |
if len(nric) != 9: | |
return False | |
nric = nric.upper() | |
if nric[0] not in ['S', 'T', 'F', 'G']: | |
return False | |
list_nric = list(nric[1:8]) | |
result = sum([int(a)*b for a, b in zip(list_nric, list_m)]) | |
if nric[0] == 'T' or nric[0] == 'G': | |
result += 4 | |
result_mod = result % 11 | |
if nric[0] == "S" or nric[0] == "T": | |
checksum = list_st[result_mod] | |
elif nric[0] == "F" or nric[0] == "G": | |
checksum = list_fg[result_mod] | |
return nric[8] == checksum | |
def fix_nric_sg(nric): | |
"""Fix the first char of the NRIC as many patients don't input that""" | |
if not check_nric_sg(nric): | |
for prefix in ['S', 'T', 'F', 'G']: | |
nric_temp = prefix + nric | |
if check_nric_sg(nric_temp): | |
return nric_temp | |
return False |
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