diff options
| author | Arthur de Jong <arthur@arthurdejong.org> | 2017-04-07 15:27:48 +0200 |
|---|---|---|
| committer | Arthur de Jong <arthur@arthurdejong.org> | 2017-04-07 15:41:35 +0200 |
| commit | 7493eca08309922c76974566cc6d2eee1de126e1 (patch) | |
| tree | 2ba5847a44c3388ffc89f10a96bb1b37c2770b38 /stdnum/ean.py | |
| parent | 23b2150c6ceee574207e0c5e5b19d2f95fbd9828 (diff) | |
Use a slightly more readable weight alternation
Switch to a slightly more readable syntax for alternating between two
weights in checksums calculations.
Diffstat (limited to 'stdnum/ean.py')
| -rw-r--r-- | stdnum/ean.py | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/stdnum/ean.py b/stdnum/ean.py index ec6007e..c237f2e 100644 --- a/stdnum/ean.py +++ b/stdnum/ean.py @@ -1,6 +1,6 @@ # ean.py - functions for handling EANs # -# Copyright (C) 2011, 2012, 2013 Arthur de Jong +# Copyright (C) 2011-2017 Arthur de Jong # # This library is free software; you can redistribute it and/or # modify it under the terms of the GNU Lesser General Public @@ -41,7 +41,7 @@ def compact(number): def calc_check_digit(number): """Calculate the EAN check digit for 13-digit numbers. The number passed should not have the check bit included.""" - return str((10 - sum((3 - 2 * (i % 2)) * int(n) + return str((10 - sum((3, 1)[i % 2] * int(n) for i, n in enumerate(reversed(number)))) % 10) |