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![Melissa Benton](https://secure.gravatar.com/avatar/72efdb468b96a747dcdc17fe890291d1?s=96&d=https%3A%2F%2Fecs-static.teamtreehouse.com%2Fassets%2Fcontent%2Fdefault_avatar-445fbbabfc8dc9188fb5967fe43322ee0c3e0dd1e10f378bf8343784af5a13eb.webp&r=pg)
Melissa Benton
Front End Web Development Techdegree Graduate 17,805 PointsWhat 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?
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](https://uploads.teamtreehouse.com/production/profile-photos/6569772/micro_mark.jpg)
Mark Sebeck
Treehouse Moderator 37,777 PointsMelissa 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!