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- from typing import List
- def luhn_checksum(number: float) -> int:
- def digits_of(n: float) -> List[int]:
- return [int(d) for d in str(n)]
- digits = digits_of(number)
- odd_digits = digits[-1::-2]
- even_digits = digits[-2::-2]
- checksum = 0
- checksum += sum(odd_digits)
- for d in even_digits:
- checksum += sum(digits_of(d * 2))
- return checksum % 10
- def calculate_luhn(partial_number: float) -> int:
- """
- Generates the Checksum using Luhn's algorithm
- """
- check_digit = luhn_checksum(int(partial_number) * 10)
- return check_digit if check_digit == 0 else 10 - check_digit
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