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

devante wallace
devante wallace
5,151 Points

what do i need to add to my code in order to make laps increase every time run_lap is run?

Im guessing an if statement or while loop but i dont know how to add it in?

racecar.py
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.length = length
      self.fuel_remaining = self.fuel_remaining - self.length*0.125
      self.laps =+ 1

3 Answers

Jeff Muday
MOD
Jeff Muday
Treehouse Moderator 28,717 Points

You're very close! The last instruction of the challenge is to set the class variable 'laps' inside of the the __init__ method.

A good programming practice is to set all instance variables (color, fuel_remaining, laps) inside of the __init__. This prevents the parent class from changing the data inside the instance variables.

Good luck with your Python journey!

class RaceCar:

  def __init__(self, color, fuel_remaining, **kwargs):
      # set laps to 0 inside the __init__
      self.laps = 0
      self.color = color
      self.fuel_remaining = fuel_remaining
      for key, value in kwargs.items():
        setattr(self, key, value)
  def run_lap(self, length):
      self.length = length
      self.fuel_remaining = self.fuel_remaining - self.length*0.125
      self.laps += 1

[MOD: added backticks around `__init__`-cf]

devante wallace
devante wallace
5,151 Points

So i have done this and it still says my code is incorrect, is there something else i am missing?

This

self.laps =+ 1

should be:

self.laps += 1
kevin curtis
kevin curtis
15,287 Points

Hi Devante, That challenge seems a bit buggy. I did the same challenge earlier today. It told me to try again even though the answer was correct. I rewrote the same code, clicked submit again and it went through ok for me.

if you've made the adjustments as Jeff suggested, then your code should be good to go.