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

McKenzie Klasing
McKenzie Klasing
1,720 Points
Posted by McKenzie Klasing
McKenzie Klasing
1,720 Points

Using Dot Notation to access an attribute in class Panda - receiving: NameError: name 'Panda' is not defined

This is my first time asking a question so I apologize if it isn't formatted correctly.

This Challenge task reads as follows: Create a method called eat. It should only take self as an argument. Inside of the method, set the is_hungry attribute to False, since the Panda will no longer be hungry when it eats. Also, return a string that says ''Bao Bao eats bamboo.'' where ''Bao Bao'' is the name attribute and ''bamboo'' is the food attribute.

I receive this error: NameError: name 'Panda' is not defined regarding line 12, return str(f'{self.name} eats {Panda.food}')

I am able to get this code to run in my own IDE (mu) and it prints "Bao Bao eats bamboo" which tells me Panda.food is working properly. I've tried numerous things to fix this like using self.food but of course that doesn't work because this is a class attribute, not an instance attribute... Am I getting this wrong or is the task grader/checker looking for it to be written a different way?

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 str(f'{self.name} eats {Panda.food}')

panda_one = Panda('Bao Bao', 4)

print(panda_one.eat())

3 Answers

Travis Alstrand
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Travis Alstrand
Treehouse Project Reviewer
Travis Alstrand
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Travis Alstrand
Treehouse Project Reviewer

Hey there McKenzie Klasing ! :wave:

So one very sneaky thing I just noticed was at one point I had to look in the Test Results at the error and it mentions to "make sure there is a period".

We also don't need to use the str() method, we can just straight up return the f-string and use self.food

return f'{self.name} eats {self.food}.'
McKenzie Klasing
McKenzie Klasing
1,720 Points
McKenzie Klasing
McKenzie Klasing
1,720 Points

Awesome thanks Travis!

That did work! I also had to remove the print statement at the end. I appreciate you taking the time to assist me with this-

Chuwen Tan
Chuwen Tan
5,786 Points
Chuwen Tan
Chuwen Tan
5,786 Points

I would like to know for this question, since food is a class attribute, not an instance attribute. Can I write

return f'{self.name} eats {Panda.food}.'

? Thank you!

Travis Alstrand
seal-mask
.a{fill-rule:evenodd;}techdegree seal-36
Travis Alstrand
Treehouse Project Reviewer
Travis Alstrand
.a{fill-rule:evenodd;}techdegree seal-36
Travis Alstrand
Treehouse Project Reviewer

Stephanie Tan ,

Out in the real world, yes you can. I just copied the code over to a new Python file in my local text editor and it printed the statement just fine in the console.

This challenge is just looking for self.food specifically and will throw a regex related Assertion Error unfortunately if we try Panda.food.

Here's what I ran locally though if you wanted to see for yourself :thumbsup:

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 f"{self.name} eats {Panda.food}."


new_panda = Panda("Taco", 75)
print(new_panda.eat())
Chuwen Tan
Chuwen Tan
5,786 Points
Chuwen Tan
Chuwen Tan
5,786 Points

Thank you for the elaboration Travis Alstrand!