adding lab 12 part 1 and part 2

Author: HolmesMatthew

Code/matthew/python/Labs/lab12.py

@@ -0,0 +1,90 @@
+"""
+Lab 12: ATM
+Let's represent an ATM with a class containing two attributes: a balance and an interest rate. A newly created account will default to a balance of 0 and an interest rate of 0.1%. Implement the initializer, as well as the following functions:
+Version 1
+
+check_balance() returns the account balance
+deposit(amount) deposits the given amount in the account
+check_withdrawal(amount) returns true if the withdrawn amount won't put the account in the negative
+withdraw(amount) withdraws the amount from the account and returns it
+calc_interest() returns the amount of interest calculated on the account
+
+Version 2
+Have the ATM maintain a list of transactions. 
+Every time the user makes a deposit or withdrawal, add a string to a list saying 'user deposited $15' or 'user withdrew $15'. 
+Add a new method print_transactions() to your class for printing out the list of transactions, and add a transactions option to your REPL loop.
+
+"""
+class ATM:
+    def __init__(self, balance=0,interest_rate=0.1, transactions = ''):
+        self.balance = balance
+        self.interest_rate = interest_rate
+        self.transactions = transactions
+    
+    def check_balance(self):
+        return self.balance
+        
+    def deposit(self,amount):
+        transactions = ''.join(f"{amount} deposited")
+        self.transactions += transactions
+        self.balance += amount
+    
+    def check_withdrawal(self,amount):
+        if self.balance - amount > 0:
+            return True
+        else:
+            return False
+    def withdraw(self, amount):
+        transactions = ''.join(f"{amount} deposited")
+        self.transactions += (', ' + transactions)
+        self.balance -= amount
+        return amount
+    
+    def calc_interest(self):
+        interest_growth = 0
+        interest_growth = self.interest_rate * self.balance
+        return interest_growth
+    def print_transactions(self):
+        return self.transactions
+        
+
+
+
+
+atm = ATM() # create an instance of our class
+print('Welcome to the ATM')
+while True:
+    command = input('Enter a command: ')
+    if command == 'balance':
+        balance = atm.check_balance() # call the check_balance() method
+        print(f'Your balance is ${balance}')
+    elif command == 'deposit':
+        amount = float(input('How much would you like to deposit? '))
+        atm.deposit(amount) # call the deposit(amount) method
+        print(f'Deposited ${amount}')
+    elif command == 'withdraw':
+        amount = float(input('How much would you like '))
+        if atm.check_withdrawal(amount): # call the check_withdrawal(amount) method
+            atm.withdraw(amount) # call the withdraw(amount) method
+            print(f'Withdrew ${amount}')
+        else:
+            print('Insufficient funds')
+    elif command == 'interest':
+        amount = atm.calc_interest() # call the calc_interest() method
+        atm.deposit(amount)
+        print(f'Accumulated ${amount} in interest')
+    elif command == 'transactions':
+        transactions = atm.print_transactions()
+        print(transactions)
+    elif command == 'help':
+        print('Available commands:')
+        print('transactions - get a list of transactions')
+        print('balance  - get the current balance')
+        print('deposit  - deposit money')
+        print('withdraw - withdraw money')
+        print('interest - accumulate interest')
+        print('exit     - exit the program')
+    elif command == 'exit':
+        break
+    else:
+        print('Command not recognized')