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Python Basic Object-Oriented Python Welcome to OOP Methods

Clarification on use_gas method

Trying to get a better understanding of the use_gas method below:

def use_gas(self):
        self.gas -= 50
        if self.gas <= 0:
            return False
        else:
            return True

I think we are using booleans for the same logic as to why we use the "if not" in the go method:

def go(self, speed):
        if self.use_gas():
            if not self.is_moving:
                print('The car has started moving')
                self.is_moving = True
            print(f'The car is going {speed}')
        else:
            print('You have run out of gas')
            self.stop()

If I'm understanding this correctly, the go method is checking if "self.use_gas" is truthy? So if it's True it will run the "if not self.is_moving" but if it's false (ie not truthy) we print you are out of gas. Is this the correct logic?

1 Answer

Chris Freeman
MOD
Chris Freeman
Treehouse Moderator 68,457 Points

Hey Kylie Nonemaker, you have it correct.

Post back if you need more help. Good luck!!!