"""
This file includes the most basic implementation of the
Account class from the book, and also an alternative
implementation using a dictionary to hold the account
information. Both versions work fine for this simple case,
but the class implementation packs the data (account info)
and the corresponding functions more closely together. This
improves structure and readability, which
may be important for larger software systems. 
"""

class Account:
    def __init__(self, name, account_number, initial_amount):
        self.name = name
        self.no = account_number
        self.balance = initial_amount

    def deposit(self, amount):
        self.balance += amount

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

    def dump(self):
        s = '%s, %s, balance: %s' % \
            (self.name, self.no, self.balance)
        print(s)


#This could also have been solved with dictionaries:
def make_account(name, account_number, initial_amount):
    return {"name":name,"no":account_number,"balance":initial_amount}

def deposit(account, amount):
    account["balance"] += amount

def withdraw(account, amount):
    account["balance"] -= amount

def dump(account):
    s = '%s, %s, balance: %s' % \
        (account["name"], account["no"], account["balance"])
    print(s)

#this code uses the class implementation to make
#two objects a1, a2 of the class Account
a1 = Account('John Olsson', '19371554951', 20000)
a2 = Account('Liz Olsson',  '19371564761', 20000)

a1.deposit(1000)
a1.withdraw(4000)
a2.withdraw(10500)
a1.withdraw(3500)
a1.dump()
a2.dump()

#and this code uses the dictionary version to make
#a single dictionary d1, which contains the same account
#information as a1
d1 = make_account('John Olsson', '19371554951', 20000)
deposit(a1,1000)
dump(d1)