input: Write a function to simulate a simple ATM machine. The function should include an account class with necessary functions, and an ATM class with necessary functions to handle account creation, deposits, withdrawals, and balance printing.
  
  
  class Account:
      def __init__(self, name, balance):
          self.name = name
          self.balance = balance
  
      def deposit(self, amount):
          self.balance += amount
  
      def withdrawal(self, amount):
          self.balance -= amount
  
  class ATM:
      def __init__(self):
          self.accounts = []
  
      def createAccount(self, name, balance):
          account = Account(name, balance)
          self.accounts.append(account)
  
      def deposit(self, name, amount):
          for account in self.accounts:
              if account.name == name:
                  account.deposit(amount)
  
      def withdrawal(self, name, amount):
          for account in self.accounts:
              if account.name == name:
                  account.withdrawal(amount)
  
      def printBalance(self, name):
          for account in self.accounts:
              if account.name == name:
                  print(name, " Balance: ", account.balance)
  
  atm = ATM()
  atm.createAccount("John", 1000)
  atm.deposit("John", 500)
  atm.withdrawal("John", 300)
  atm.printBalance("John")
  
  assert printBalance("John") == "John  Balance:  1200"
  assert deposit("John", 500) is None
  assert withdrawal("John", 300) is None
  assert createAccount("John", 1000) is None
output: 
  class Account:
      def __init__(self, name, balance):
          self.name = name
          self.balance = balance
  
      def deposit(self, amount):
          self.balance += amount
  
      def withdrawal(self, amount):
          self.balance -= amount
  
  class ATM:
      def __init__(self):
          self.accounts = []
  
      def createAccount(self, name, balance):
          account = Account(name, balance)
          self.accounts.append(account)
  
      def deposit(self, name, amount):
          for account in self.accounts:
              if account.name == name:
                  account.deposit(amount)
  
      def withdrawal(self, name, amount):
          for account in self.accounts:
              if account.name == name:
                  account.withdrawal(amount)
  
      def printBalance(self, name):
          for account in self.accounts:
              if account.name == name:
                  print(name, " Balance: ", account.balance)
  