input: 
  def test_atm_operations():
      """ Test the functionality of the ATM class by performing some operations.
      >>> atm = ATM()
      >>> atm.createAccount('John', 1000)
      >>> atm.deposit('John', 500)
      >>> atm.printBalance('John')
      John  Balance:  1500
      >>> atm.withdrawal('John', 200)
      >>> atm.printBalance('John')
      John  Balance:  1300
      """
  
output:     
      class ATM:
          def __init__(self):
              self.accounts = {}
  
          def createAccount(self, name, initial_balance):
              self.accounts[name] = initial_balance
  
          def deposit(self, name, amount):
              if name in self.accounts:
                  self.accounts[name] += amount
  
          def withdrawal(self, name, amount):
              if name in self.accounts:
                  self.accounts[name] -= amount
  
          def printBalance(self, name):
              if name in self.accounts:
                  print(f"{name}  Balance:  {self.accounts[name]}")
  