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 Basic Object-Oriented Python Welcome to OOP Adding to our Panda

Antti Nyman
Antti Nyman
9,165 Points
Posted by Antti Nyman
Antti Nyman
9,165 Points

Odd error with return "{} eats {}.".format(self.name, Panda.food), where Panda is apparently not defined.

When I run this code in workspace it runs well without any errors.

panda.py 
class Panda:
    species = 'Ailuropoda melanoleuca'
    food = 'bamboo'

    def __init__(self, name, age):
        self.is_hungry = True
        self.name = name
        self.age = age

    def eat(self):
        self.is_hungry = False
        return "{} eats {}.".format(self.name, Panda.food)

1 Answer

Steven Parker
Steven Parker
231,248 Points
Steven Parker
Steven Parker
231,248 Points

You should never refer to the class by name from inside the class code. Instance and class variables can both be referenced using the "self.' prefix.

Antti Nyman
Antti Nyman
9,165 Points
Antti Nyman
Antti Nyman
9,165 Points

Aah, you're right. Apparently it still works when referred to the class by name from inside the class code, but I guess it's just bad practise and should be avoided. Thank you! :)