I’m making a simple Bank Account class in Python. I was trying to make sure the input of set_balance() is either an int or a float. The balance is equal to 0 by default. The code goes as follows:

def set_balance(self, balance):
        if type(balance) != int or type(balance) != float:
            return

        if balance < 0 or balance >= 100000:
            return

        self._balance = balance

However whenever I set the balance then print get_balance(), the result is 0.

I was able to get the desired results with the following code:

def set_balance(self, balance):
        if type(balance) not in [int, float]:
            return

        if balance < 0 or balance >= 100000:
            return

        self._balance = balance

I have used code like while type(num) != int: in a different piece of code and it worked just as expected. Is there a reason why this type of code doesn’t work in a class method?