Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

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 68,426 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).