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python-validators/src/validators/card.py at master · sysfce2/python-validators · GitHub
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validators
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card.py
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validators
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card.py
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"""Card."""
# standard
import
re
# local
from
.
utils
import
validator
@
validator
def
card_number
(
value
:
str
,
/
):
"""Return whether or not given value is a valid generic card number.
This validator is based on [Luhn's algorithm][1].
[1]: https://github.com/mmcloughlin/luhn
Examples:
>>> card_number('4242424242424242')
# Output: True
>>> card_number('4242424242424241')
# Output: ValidationError(func=card_number, args={'value': '4242424242424241'})
Args:
value:
Generic card number string to validate
Returns:
(Literal[True]): If `value` is a valid generic card number.
(ValidationError): If `value` is an invalid generic card number.
"""
if
not
value
:
return
False
try
:
digits
=
list
(
map
(
int
,
value
))
odd_sum
=
sum
(
digits
[
-
1
::
-
2
])
even_sum
=
sum
(
sum
(
divmod
(
2
*
d
,
10
))
for
d
in
digits
[
-
2
::
-
2
])
return
(
odd_sum
+
even_sum
)
%
10
==
0
except
ValueError
:
return
False
@
validator
def
visa
(
value
:
str
,
/
):
"""Return whether or not given value is a valid Visa card number.
Examples:
>>> visa('4242424242424242')
# Output: True
>>> visa('2223003122003222')
# Output: ValidationError(func=visa, args={'value': '2223003122003222'})
Args:
value:
Visa card number string to validate
Returns:
(Literal[True]): If `value` is a valid Visa card number.
(ValidationError): If `value` is an invalid Visa card number.
"""
pattern
=
re
.
compile
(
r"^4"
)
return
card_number
(
value
)
and
len
(
value
)
==
16
and
pattern
.
match
(
value
)
@
validator
def
mastercard
(
value
:
str
,
/
):
"""Return whether or not given value is a valid Mastercard card number.
Examples:
>>> mastercard('5555555555554444')
# Output: True
>>> mastercard('4242424242424242')
# Output: ValidationError(func=mastercard, args={'value': '4242424242424242'})
Args:
value:
Mastercard card number string to validate
Returns:
(Literal[True]): If `value` is a valid Mastercard card number.
(ValidationError): If `value` is an invalid Mastercard card number.
"""
pattern
=
re
.
compile
(
r"^(51|52|53|54|55|22|23|24|25|26|27)"
)
return
card_number
(
value
)
and
len
(
value
)
==
16
and
pattern
.
match
(
value
)
@
validator
def
amex
(
value
:
str
,
/
):
"""Return whether or not given value is a valid American Express card number.
Examples:
>>> amex('378282246310005')
# Output: True
>>> amex('4242424242424242')
# Output: ValidationError(func=amex, args={'value': '4242424242424242'})
Args:
value:
American Express card number string to validate
Returns:
(Literal[True]): If `value` is a valid American Express card number.
(ValidationError): If `value` is an invalid American Express card number.
"""
pattern
=
re
.
compile
(
r"^(34|37)"
)
return
card_number
(
value
)
and
len
(
value
)
==
15
and
pattern
.
match
(
value
)
@
validator
def
unionpay
(
value
:
str
,
/
):
"""Return whether or not given value is a valid UnionPay card number.
Examples:
>>> unionpay('6200000000000005')
# Output: True
>>> unionpay('4242424242424242')
# Output: ValidationError(func=unionpay, args={'value': '4242424242424242'})
Args:
value:
UnionPay card number string to validate
Returns:
(Literal[True]): If `value` is a valid UnionPay card number.
(ValidationError): If `value` is an invalid UnionPay card number.
"""
pattern
=
re
.
compile
(
r"^62"
)
return
card_number
(
value
)
and
len
(
value
)
==
16
and
pattern
.
match
(
value
)
@
validator
def
diners
(
value
:
str
,
/
):
"""Return whether or not given value is a valid Diners Club card number.
Examples:
>>> diners('3056930009020004')
# Output: True
>>> diners('4242424242424242')
# Output: ValidationError(func=diners, args={'value': '4242424242424242'})
Args:
value:
Diners Club card number string to validate
Returns:
(Literal[True]): If `value` is a valid Diners Club card number.
(ValidationError): If `value` is an invalid Diners Club card number.
"""
pattern
=
re
.
compile
(
r"^(30|36|38|39)"
)
return
card_number
(
value
)
and
len
(
value
)
in
{
14
,
16
}
and
pattern
.
match
(
value
)
@
validator
def
jcb
(
value
:
str
,
/
):
"""Return whether or not given value is a valid JCB card number.
Examples:
>>> jcb('3566002020360505')
# Output: True
>>> jcb('4242424242424242')
# Output: ValidationError(func=jcb, args={'value': '4242424242424242'})
Args:
value:
JCB card number string to validate
Returns:
(Literal[True]): If `value` is a valid JCB card number.
(ValidationError): If `value` is an invalid JCB card number.
"""
pattern
=
re
.
compile
(
r"^35"
)
return
card_number
(
value
)
and
len
(
value
)
==
16
and
pattern
.
match
(
value
)
@
validator
def
discover
(
value
:
str
,
/
):
"""Return whether or not given value is a valid Discover card number.
Examples:
>>> discover('6011111111111117')
# Output: True
>>> discover('4242424242424242')
# Output: ValidationError(func=discover, args={'value': '4242424242424242'})
Args:
value:
Discover card number string to validate
Returns:
(Literal[True]): If `value` is a valid Discover card number.
(ValidationError): If `value` is an invalid Discover card number.
"""
pattern
=
re
.
compile
(
r"^(60|64|65)"
)
return
card_number
(
value
)
and
len
(
value
)
==
16
and
pattern
.
match
(
value
)
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