You pass in the name of the field that has the credit card expiration month and the field with the credit card expiration year.

>>> ed = CreditCardExpires()
>>> ed.to_python({'ccExpiresMonth': '11', 'ccExpiresYear': '2250'})
{'ccExpiresYear': '2250', 'ccExpiresMonth': '11'}
>>> ed.to_python({'ccExpiresMonth': '10', 'ccExpiresYear': '2005'})
Traceback (most recent call last):
    ...
Invalid: ccExpiresMonth: Invalid Expiration Date<br>
ccExpiresYear: Invalid Expiration Date

Messages

badType:

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

empty:

Please enter a value

invalidNumber:

Invalid Expiration Date

noneType:

The input must be a string (not None)

notANumber:

Please enter numbers only for month and year