class CreditCard:

""" Implementation of a credit card class. """

def __init__(self, customer, bank, account, limit):

""" create a new credit card instance. the initial balance is zero.

"""

self._customer = customer

self._bank = bank

self._account = account

self._limit = limit

self._balance = 0

def get_customer(self):

""" Return the name of the customer. """

return self._customer

def get_bank(self):

""" Return bank's name """

return self._bank

def get_account(self):

""" Return the card ID number"""

return self._account

def get_limit(self):

""" Return current credit limit. """

return self._limit

def get_balance(self):

""" Return current balance. """

return self._balance

def charge(self, price):

"""Charge given price to the card, assuming sufficient credit limit.

Return True if charge was processed; False if charge was denied.

"""

'''try:

type(price) == int or type(price) == float

except ValueError:

print 'Not a number!'

if type(price) != int or type(price) != float:

raise ValueError("Not a number!")

'''

if price < 0:

return False

elif price + self._balance > self._limit:

return False

else:

self._balance += price

return True

def make_payment(self, payment):

"""Process customer payment that reduces balance."""

self._balance -= payment