checkdigit.luhn.calculate¶

checkdigit.luhn.calculate(data: str) → str[source]¶

Calculates the luhn check digit.

Parameters:: data – A block of data without the check digit
Returns:: A string representing the missing check digit
Return type:: str

Examples

>>> from checkdigit import luhn
>>> luhn.calculate("53251309870224")
'3'
>>> luhn.calculate("950123440000")
'8'