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Python Object-Oriented Python Instant Objects Master Class

Maba Bah
Maba Bah
2,744 Points
Posted by Maba Bah
Maba Bah
2,744 Points

Feel like I'm missing a small detail here

Can anyone tell me what I'm missing? Please explain your answer. Thank you!

racecar.py 
class RaceCar:
    def __init__(self,color,fuel_remaining,**kwargs):
        self.color = color
        self.fuel_remaining = fuel_remaining
        self.kwargs = kwargs
        for key,value in kwargs.items():
            setattr(self,key,value)
    laps = 0       

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

1 Answer

Björn Wasserfuhr
Björn Wasserfuhr
1,965 Points

You nearly got it. You just have to add the self keyword to the laps attribute in the init and run_lap method like you already did with color and fuel_remaining:

self.laps = 0

self.laps += 1

Otherwise your instance wont be able to access the laps attribute.

You also forgot to indent self.laps = 0. If you fix this it should work. If i explained something wrong please correct me.

Maba Bah
Maba Bah
2,744 Points
Maba Bah
Maba Bah
2,744 Points

Thank you so much! One more question, is self.kwargs = kwargs necessary? I'm not too familiar with kwargs, I feel like it's wrong

Björn Wasserfuhr
Björn Wasserfuhr
1,965 Points

You`re welcome.

You are right, self.kwargs = kwargs is not necessary. The for loop and setattr() will do the job. I just tested it out in the REPL, if we write self.kwargs = kwargs we could only use it to check which additional key value pairs we assigned to the instance by typing instance_name.kwargs.

So for example if we create the instance Mercedes = RaceCar("silver", 100, example1 = "example", example2 = 4) we could then type Mercedes.kwargs and would get the output {"example 1" : "example", "example2" : 4}.

I am not sure if the ability to check this could be useful but either way it is not necessary.