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Python Object-Oriented Python Inheritance Multiple Superclasses

AttributeError: 'Thief' object has no attribute 'agile'

Characters.py
class Character:
    def __init__(self, name, **kwargs):
        self.name = name

        for key, value in kwargs.items():
            setattr(self, key, value)
Attributes.py
import random


class Sneaky:
    sneaky = True

    def __init__(self, sneaky=True, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.sneaky = sneaky

    def hide(self, light_level):
        return self.sneaky and light_level < 10


class Agile:
    agile = True

    def __init__(self, agile=True, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.agile = agile

    def evade(self):
        return self.agile and random.randint(0, 1)
Theives.py
import random

from attributes import Agile, Sneaky
from characters import Character


class Thief(Character, Agile, Sneaky):
    def pickpocket(self):
        return self.sneaky and bool(random.randint(0, 1))
Play.py
from thieves import Thief
ken = Thief("ken",sneaky = False)
print(ken.sneaky)
print(ken.agile)
print(ken.hide(8))
False                                                                                                                                                                   
Traceback (most recent call last):                                                                                                                                      
  File "play.py", line 4, in <module>                                                                                                                                   
    print(ken.agile)                                                                                                                                                    
AttributeError: 'Thief' object has no attribute 'agile'

1 Answer

Jeff Muday
MOD
Jeff Muday
Treehouse Moderator 26,896 Points

This is a good question to ask-- you are discovering an important Python convention!

Python expects the "case" of the import modules to match the case of the source file. PEP-8 (one of our guiding conventions) there is a suggestion that all filenames should be lowercase.

https://www.python.org/dev/peps/pep-0008/#package-and-module-names

quoting this--

Modules should have short, all-lowercase names. Underscores can be used in the module name if it improves readability. Python packages should also have short, all-lowercase names, although the use of underscores is discouraged.

In your example, to make it work, you should do the following renames.

Characters.py should be characters.py

Attributes.py should be attributes.py

Thieves.py should be thieves.py

Good luck with your Python journey-- Kenneth is a great teacher and has lots of knowledge about multiple resolution order in objects.