Need some help with Method

def __init__(self, model, year, make = "Ferrari"):
    self.model = model
    self.year = year
    self.make = make
    self.gas = 1000
    self.is_moving = False

def stop(self):
    if self.is_moving:
        print("The car has stopped")
        self.is_moving = False
    else:
        print("The car has already stopped")

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

def use_gas(self):
    self.gas -= 10
    if self.gas <= 0:
        return False
    else:
        return True