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fix checksum issue from #196 #197

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fix checksum issue from #196 #197

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6 changes: 3 additions & 3 deletions barcode/ean.py
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Original file line number Diff line number Diff line change
Expand Up @@ -90,9 +90,9 @@ def calculate_checksum(self):
def sum_(x, y):
return int(x) + int(y)

evensum = reduce(sum_, self.ean[-2::-2])
oddsum = reduce(sum_, self.ean[-1::-2])
return (10 - ((evensum + oddsum * 3) % 10)) % 10
evensum = reduce(sum_, self.ean[1:12:2])
oddsum = reduce(sum_, self.ean[0:11:2])
Comment on lines +93 to +94
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This will break some subclasses like EuropeanArticleNumber8. You should use self.digits instead of 12 here.

return (10 - ((oddsum + evensum * 3) % 10)) % 10
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Why did you swap the order here? The result should be the same, right?


def build(self):
"""Builds the barcode pattern from `self.ean`.
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