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

Khaleel Yusuf
Khaleel Yusuf
15,208 Points
Posted by Khaleel Yusuf
Khaleel Yusuf
15,208 Points

Master Class

What is wrong with this code?

racecar.py 
class RaceCar:
    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)

    laps = 0   
    def run_lap(length):
        self.fuel_remaining = self.fuel_remaining - (self.length * 0.125)
        self.laps += 1

1 Answer

Steven Parker
Steven Parker
231,269 Points
Steven Parker
Steven Parker
231,269 Points

Since "length" is a parameter and not a class variable, it should not have "self." prefixed to it.

Khaleel Yusuf
Khaleel Yusuf
15,208 Points
Khaleel Yusuf
Khaleel Yusuf
15,208 Points

I removed the "self." but it still didn't run.

Steven Parker
Steven Parker
231,269 Points
Steven Parker
Steven Parker
231,269 Points

The first parameter of an instance method should be "self".