from threading import Thread, Lock

class atm:
    def __init__(self):
        self.balance = 1000
        self.lock = Lock()

    def takeMoneyOut(self, quantity):
        with self.lock:
            if self.balance >= quantity:
                self.balance -= quantity
                return True
            else:
                return False
            
def user(atm, amount):
    if atm.takeMoneyOut(amount):
        print("Taken out: ", amount)
    else:
        print("Not enough balance")

theAtm = atm()
users = []

for i in range(10):
    t = Thread(target=user, args=(theAtm, 200))
    users.append(t)
    t.start()

for t in users:
    t.join()

print("Final balance: ", theAtm.balance)