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Python Object-Oriented Python Instant Objects Master Class

Posted by sage georgi
sage georgi
2,005 Points

RaceCar class

I have no idea why this wont work and I get an error in visual studio "using variable 'laps' before assignment" Any help would be greatly appreciated.

racecar.py 
class RaceCar:
    laps = 0
    def __init__(self,color, fuel_remaining,**kwargs):
        self.color = color
        self.fuel_remaining = fuel_remaining
        for color, fuel_remaining in kwargs.items():
            setattr(self,color,fuel_remaining)
    def run_lap(self,length):
        self.fuel_remaining = fuel_remaining - length * 0.125
        laps = laps + 1
sage georgi
sage georgi
2,005 Points

Also I changed fuel_remaining in run_lap to self.fuel_remaining

1 Answer

Steven Parker
Steven Parker
231,261 Points
Steven Parker
Steven Parker
231,261 Points

Good call changing "fuel_remaining" to "self.‌fuel_remaining". :+1:

Now just do the same to both references to "laps" on the last line and you should pass.

Also, you can make these kinds of things less likely and compact your code a bit by using the "addition (or subtraction) assignment" operators:

        self.fuel_remaining -= length * 0.125
sage georgi
sage georgi
2,005 Points

Ok thank you that fixed the problem. One other question why not add self.laps to my init method?

Steven Parker
Steven Parker
231,261 Points
Steven Parker
Steven Parker
231,261 Points

That's actually a good idea, and task 3 of the challenge will ask you to do exactly that!