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Python Object-Oriented Python Instant Objects Master Class

Yu-Che Hung
PLUS
Yu-Che Hung
Courses Plus Student 10,607 Points
Posted by Yu-Che Hung
Yu-Che Hung
Courses Plus Student 10,607 Points

stuck in def run_lap method

stuck in def run_lap method

racecar.py 
class RaceCar:
    def __init__(self, color, fuel_remaining, **kwargs):
        self.color = color
        self.fuel_remaining = fuel_remaining
        for k , v in kwargs.items():
            setattr(self, k, v)

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

6 Answers

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

Regarding the laps attribute, the instructions say to "increment it each time the run_lap method is called", but the method currently resets it to 0 on each call.

But also remember to initialize it to 0 in the constructor.

Yu-Che Hung
Yu-Che Hung
Courses Plus Student 10,607 Points
Yu-Che Hung
Yu-Che Hung
Courses Plus Student 10,607 Points

thank you steven but how to "increment it each time the run_lap method is called"?

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

The most common way would be:

        self.laps += 1
Yu-Che Hung
PLUS
Yu-Che Hung
Courses Plus Student 10,607 Points
Yu-Che Hung
Yu-Che Hung
Courses Plus Student 10,607 Points

class RaceCar: def init(self, color, fuel_remaining, **kwargs): self.color = color self.fuel_remaining = fuel_remaining for k , v in kwargs.items(): setattr(self, k, v)

def run_lap(self, length,laps=0):
    self.fuel_remaining = self.fuel_remaining - (length * 0.125)
    self.laps += 1
Steven Parker
Steven Parker
231,261 Points
Steven Parker
Steven Parker
231,261 Points

It doesn't look like you remembered to initialize it to 0 in the constructor.

Yu-Che Hung
PLUS
Yu-Che Hung
Courses Plus Student 10,607 Points
Yu-Che Hung
Yu-Che Hung
Courses Plus Student 10,607 Points

class RaceCar: def init(self, color, laps=0, fuel_remaining, **kwargs): self.color = color self.laps = laps self.fuel_remaining = fuel_remaining for k , v in kwargs.items(): setattr(self, k, v)

def run_lap(self, length):
    self.fuel_remaining = self.fuel_remaining - (length * 0.125)
    self.laps += 1
Yu-Che Hung
PLUS
Yu-Che Hung
Courses Plus Student 10,607 Points
Yu-Che Hung
Yu-Che Hung
Courses Plus Student 10,607 Points

class RaceCar: def init(self, color, fuel_remaining, **kwargs): self.color = color self.fuel_remaining = fuel_remaining for k , v in kwargs.items(): setattr(self, k, v)

laps = 0   


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