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luhn exercise numeric check edit

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Xevion
2019-07-13 21:56:38 -05:00
parent 6c5c3f3d74
commit 58551699d2
1 changed files with 5 additions and 2 deletions
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7
python/luhn/luhn.py
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@@ -1,8 +1,11 @@
class Luhn(object):
def __init__(self, card_num):
self.card_num = ''.join(filter(lambda x : x in '0123456789', card_num))
self.card_num = card_num
def valid(self):
temp = [int(num[1]) * 2 if (num[0]+1) % 2 == 0 else int(num[1]) for num in enumerate(self.card_num[::-1])]
if len(self.card_num) < 2 or not self.card_num.isnumeric():
return False
temp = ''.join(filter(lambda x : x in '0123456789', self.card_num))
temp = [int(num[1]) * 2 if (num[0]+1) % 2 == 0 else int(num[1]) for num in enumerate(temp[::-1])]
temp = [num - 9 if num > 9 else num for num in temp]
return sum(temp) % 10 == 0