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

Melissa Benton
seal-mask
.a{fill-rule:evenodd;}techdegree seal-36
Melissa Benton
Front End Web Development Techdegree Graduate 17,805 Points

What is incorrect with the run_lap method?

I'm unsure what is incorrect with the run_lap method I wrote. Is the self.fuel_remaining equation written incorrectly?

racecar.py
class RaceCar:
    laps = 0

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

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

    def run_lap(self, length):
        self.fuel_remaining - (length * 0.125) 
        laps += 1

1 Answer

Mark Sebeck
MOD
Mark Sebeck
Treehouse Moderator 38,004 Points

Melissa Benton two things wrong. You forgot to add self in front of laps. Also you are not setting fuel remaining. It should be -= instead of - . Hope this helps and keep at it!