You pass in the name of the field that has the credit card type and the field with the credit card security code.

>>> code = CreditCardSecurityCode()
>>> code.to_python({'ccType': 'visa', 'ccCode': '111'})
{'ccType': 'visa', 'ccCode': '111'}
>>> code.to_python({'ccType': 'visa', 'ccCode': '1111'})
Traceback (most recent call last):
    ...
Invalid: ccCode: Invalid credit card security code length

Messages

badLength:

Invalid credit card security code length

badType:

The input must be a string (not a %(type)s: %(value)r)

empty:

Please enter a value

noneType:

The input must be a string (not None)

notANumber:

Please enter numbers only for credit card security code