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45 def sum_digits(num): 46 return sum(map(int, list(str(num))))

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30 def is_even_sum_of_digits(number): 31 lista = list(str(number)) 32 lista = map(int, lista) 33 sum = reduce(operator.add, lista) 34 35 if sum % 2 == 0: 36 return True 37 return False

221 def digit_count(x): 222 return sum(c.isdigit() for c in x)

48 def calc_check_digit(number): 49 """Calculate the check digit. The number passed should not have the 50 check digit included.""" 51 weights = (21, 19, 17, 13, 11, 9, 7, 3, 1) 52 return str(sum(w * int(n) for w, n in zip(weights, number)) % 10)

56 def calc_check_digit(number): 57 """Calculate the check digits for the number.""" 58 return str(sum(int(n) * (7 - i) for i, n in enumerate(number[:6])) % 10)

54 def calc_check_digit(number): 55 """Calculate the check digit for personal codes. The number passed 56 should not have the check digit included.""" 57 # note that this algorithm has not been confirmed by an independent source 58 weights = (2, 7, 9, 1, 4, 6, 3, 5, 8, 2, 7, 9) 59 check = sum(w * int(n) for w, n in zip(weights, number)) % 11 60 return '1' if check == 10 else str(check)

84 def _check_digit(number): 85 """Calculate a single check digit on the provided part of the number.""" 86 weights = (13, 15, 12, 5, 4, 17, 9, 21, 3, 7, 1) 87 s = sum(w * (int(n) if n.isdigit() else alphabet.find(n) + 1) 88 for w, n in zip(weights, number)) 89 return 'MQWERTYUIOPASDFGHJKLBZX'[s % 23]

24 def digits_of(n): 25 return [int(d) for d in str(n)]

110 def calc_check_digit(number): 111 """Calculate the extra digit that should be appended to the number to 112 make it a valid number.""" 113 return str(_multiplication_table[checksum(str(number) + '0')].index(0))

71 def calc_check_digit(number): 72 """Calculate the check digit. The number passed should have the check 73 digit included.""" 74 checksum = (1 - 2 * int(number[:-1], 13)) % 11 75 return 'X' if checksum == 10 else str(checksum)