# a typical Python class example

# a typical Python class example
# newer class convention uses inheritance place holder (object)

class Account(object):
    # __init__() initializes a newly created class instance,
    # 'self' refers to the particular class instance
    # and also carries the data between the methods.
    # You have to supply the initial account balance
    # during creation of the class instance.
    def __init__(self, initial):
        self.balance = initial

    def deposit(self, amt):
        # a function within a class is called a method
        # self always starts the argument list of a method
        self.balance = self.balance + amt

    def withdraw(self,amt):
        self.balance = self.balance - amt

    def getbalance(self):
        return self.balance


# create two new class instance, Mary's and Tom's account
mary = Account(1000.00) # start with initial balance of 1000.00
tom = Account(3000.00)  # tom is lucky he starts with 3000.00

# Mary makes deposits and a withdrawel
mary.deposit(500.00)
mary.deposit(23.45)
mary.withdraw(78.20)

# Tom also accesses his account
tom.withdraw(1295.50)

# now look a the account balances
print "Mary's balance = $%0.2f" % mary.getbalance()  # $1445.25
print "Tom's balance  = $%0.2f" % tom.getbalance()   # $1704.50