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Python Object-Oriented Python Instant Objects Master Class

Dekel Zoaretz
Dekel Zoaretz
14,864 Points

Stuck in quiz, can't seem to figure out why

Why isn't this compiling?

racecar.py
class RaceCar:
    color = ""
    fuel_remaining = 0
    laps = 0

    def __init__(self, color, fuel_remaining, laps, **kwargs):
        self.color = color
        self.fuel_remaining = fuel_remaining
        self.laps = laps

        for key, value in kwargs.items():
            setattr(self, key, value)

    def run_lap(self, length):
        self.laps++
        self.fuel_remaining = self.fuel_remaining - (length * 0.125)

2 Answers

Chris Freeman
MOD
Chris Freeman
Treehouse Moderator 68,441 Points

Beyond the typo Christian mentioned (replace ++ with += 1), the challenge asks you to assign laps in the __init__ section but does not ask to add it to the argument list.

  • remove the laps parameter
  • set self.laps = 0
  • bonus: laps, color and fuel_remaining do not need to be set to default class values.
Christian Mangeng
Christian Mangeng
15,970 Points

Hi Dekel,

in Python it is not valid syntax to use ++ for incrementing (use self.laps += 1 instead). Also, you shouldn't initialize color and fuel_remaining directly on the class. It is better to let the init method do this job (see also task 3/3).