Skip to content

Instantly share code, notes, and snippets.

@keiichiroy

keiichiroy/calculate_jancode_checkdigit.py

Created January 29, 2020 03:09
Show Gist options

  • Select an option

    Learn more about clone URLs
  • Save keiichiroy/14d3c7f5072617ca2f2a0cfe5ca4ff05 to your computer and use it in GitHub Desktop.

Select an option

Learn more about clone URLs
Save keiichiroy/14d3c7f5072617ca2f2a0cfe5ca4ff05 to your computer and use it in GitHub Desktop.
Download ZIP
Calculating JAN/EAN check digit
Raw
calculate_jancode_checkdigit.py
from functools import reduce
string = '456995111617'
odds = string[1::2]
evens = string[0::2]
sum_from_odds = reduce(lambda a,b: int(a)+int(b),odds) * 3
sum_from_evens = reduce(lambda a,b: int(a)+int(b),evens)
value_to_minus = str(sum_from_odds + sum_from_evens)[-1]
check_digit = str(10 - int(value_to_minus))
code = string + check_digit
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment