信用卡号验证

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我是靠谱客的博主尊敬啤酒，这篇文章主要介绍信用卡号验证，现在分享给大家，希望可以做个参考。

分类：

1、开头一位是4，则是 ‘Visa Card'

2、开头两位是50或者67或者58或者63，则是‘Maestro Card'

3、开头是一位是5，则是’Master Card'

4、开头两位是37，则是'American Express Card'

5、开头两位是62，则是‘Unionpay Card'

6、开头一位是6，则是‘Discover Card'

7、开头两位是35，则是‘JCB Card'

8、开头一位是7，则是‘ Gasoline Card'

长度：

卡号的长度必须是13到19位之间

卡号：

1、将卡号反转

2、将偶数位相加

3、奇数位乘以2，如果乘积是两位数，则将每位相加求和，否则将乘积相加

4、将2，3步求的总和相加对10进行取余，如果等于0，则是有效卡，否则是无效卡

python代码：

复制代码

class CreditCard(object):
def __init__(self, card_no):
self.card_no = card_no
@property
def company(self):
comp = None
if str(self.card_no).startswith('4'):
comp = 'Visa Card'
elif str(self.card_no).startswith(('50', '67', '58', '63',)):
comp = 'Maestro Card'
elif str(self.card_no).startswith('5'):
comp = 'Master Card'
elif str(self.card_no).startswith('37'):
comp = 'American Express Card'
elif str(self.card_no).startswith('62'):
comp = 'Unionpay Card'
elif str(self.card_no).startswith('6'):
comp = 'Discover Card'
elif str(self.card_no).startswith('35'):
comp = 'JCB Card'
elif str(self.card_no).startswith('7'):
comp = 'Gasoline Card'
return 'Company : ' + comp
def first_check(self):
if 13 <= len(self.card_no) <= 19:
message = "First check : Valid in terms of length."
else:
message = "First check : Check Card number once again it must be of 13 or 16 digits long."
return message
def validate(self):
# double every second digit from right to left
sum_ = 0
crd_no = self.card_no[::-1]
for i in range(len(crd_no)):
if i % 2 == 1:
double_it = int(crd_no[i]) * 2
if len(str(double_it)) == 2:
sum_ += sum([eval(i) for i in str(double_it)])
else:
sum_ += double_it
else:
sum_ += int(crd_no[i])
if sum_ % 10 == 0:
response = "Valid Card"
else:
response = 'Invalid Card'
return response
@property
def checksum(self):
return '#CHECKSUM# : ' + self.card_no[-1]
@classmethod
def set_card(cls, card_to_check):
return cls(card_to_check)
if __name__ == '__main__':
card_number = input("please input card no: ")
card = CreditCard.set_card(card_number)
print(card.company)
print("Card: ", card.card_no)
print(card.first_check())
print(card.checksum)
print(card.validate())

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class CreditCard(object):
def __init__(self, card_no):
self.card_no = card_no
@property
def company(self):
comp = None
if str(self.card_no).startswith('4'):
comp = 'Visa Card'
elif str(self.card_no).startswith(('50', '67', '58', '63',)):
comp = 'Maestro Card'
elif str(self.card_no).startswith('5'):
comp = 'Master Card'
elif str(self.card_no).startswith('37'):
comp = 'American Express Card'
elif str(self.card_no).startswith('62'):
comp = 'Unionpay Card'
elif str(self.card_no).startswith('6'):
comp = 'Discover Card'
elif str(self.card_no).startswith('35'):
comp = 'JCB Card'
elif str(self.card_no).startswith('7'):
comp = 'Gasoline Card'
return 'Company : ' + comp
def first_check(self):
if 13 <= len(self.card_no) <= 19:
message = "First check : Valid in terms of length."
else:
message = "First check : Check Card number once again it must be of 13 or 16 digits long."
return message
def validate(self):
# double every second digit from right to left
sum_ = 0
crd_no = self.card_no[::-1]
for i in range(len(crd_no)):
if i % 2 == 1:
double_it = int(crd_no[i]) * 2
if len(str(double_it)) == 2:
sum_ += sum([eval(i) for i in str(double_it)])
else:
sum_ += double_it
else:
sum_ += int(crd_no[i])
if sum_ % 10 == 0:
response = "Valid Card"
else:
response = 'Invalid Card'
return response
@property
def checksum(self):
return '#CHECKSUM# : ' + self.card_no[-1]
@classmethod
def set_card(cls, card_to_check):
return cls(card_to_check)
if __name__ == '__main__':
card_number = input("please input card no: ")
card = CreditCard.set_card(card_number)
print(card.company)
print("Card: ", card.card_no)
print(card.first_check())
print(card.checksum)
print(card.validate())