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 Advanced Objects Dream Car

Rosanna Tan
Rosanna Tan
2,058 Points
Posted by Rosanna Tan
Rosanna Tan
2,058 Points

Can anyone help with the following challenge? Not sure what I’m doing wrong. The error I received is AssertionError: Reg

Can anyone help with the following challenge? Not sure what I’m doing wrong. The error I received is 

AssertionError: Regex didn't match: '(\\{self.make\\})\\s(\\{self.model\\})' not found in 'class DreamCar:
 def __init__(self, make, model):
 self.make = make
 self.model = model
 # insert your code here
 def __str__ (self):
 return "My dream car is a { }{}".format(self.make, self.model)' : 
You'll need to use `self` when using the attributes make and model.

Challenge: Add a str method to the DreamCar class. In the method, return a string that states the dream car's make and model. The string should look like this: 'My dream car is a Ford Mustang.'

My code:

dream_car.py 
class DreamCar:
    def __init__(self, make, model):
        self.make = make
        self.model = model
    # insert your code here
    def __str__ (self):
        return "My dream car is a {}{}".format(self.make, self.model)

3 Answers

Chris Freeman
MOD
Chris Freeman
Treehouse Moderator 68,423 Points
Chris Freeman
Chris Freeman
Treehouse Moderator 68,423 Points

You are very close! An f-string is not required. Your original code has two errors:

  • missing period at end of sentence
  • missing space between format fields

Post back if you need more help. Good luck!!!

Michael Cronk
Michael Cronk
8,969 Points
Michael Cronk
Michael Cronk
8,969 Points

This has been happening to a lot of people, You have it right!! It's just the code interrupter thats being weird. I had the same problem. Instead you have to use an 'f-string'.

    def __str__(self):
        return f"My dream car is a {self.make} {self.model}."
Rosanna Tan
Rosanna Tan
2,058 Points
Rosanna Tan
Rosanna Tan
2,058 Points

Thanks so much, Michael :)

Lynn Collins
Lynn Collins
10,080 Points
Lynn Collins
Lynn Collins
10,080 Points

not working

  def__str__(self):
        return "My dream car is a {} {}.".format(self.make, self.model)

I suck at this challenge!

Chris Freeman
Chris Freeman
Treehouse Moderator 68,423 Points
Chris Freeman
Chris Freeman
Treehouse Moderator 68,423 Points

A space is needed after def. Notice how the syntax highlighting has __str__ the same color as def?