[SOLVED] First python code. Trouble with subclasses. Improperly defined a variable?

Myk267 · 05-31-2018, 01:18 AM

Quote:

Originally Posted by vysero

Okay well that worked, thanks; however, I am not sure why. In the video tutorial his code worked for him just fine. Is this some new convention in my newer version of Python as compared with his older version of Python?

I wasn't able to pin down why Derek's incorrect code nevertheless worked. I even pulled down Python 3.4.2 but I still get the same error. It's possible it was a macos/32 bug. Though, interestingly, in the video's description box there's a link to a 'cheatsheet' that has corrected code.

Anyone out there with a 32 bit mac want to run an experiment?

dugan · 06-01-2018, 08:19 AM

I noticed some antipatterns.

First, he's using toString and not __str__

Code:

class Dog(Animal):
    def __init__(self):
        def __init__(self)

a = Animal()
print a

Note that __str__ is called automatically when you call print.

If he's using Python 3, then he should be using Python 3's super syntax:

Code:

class Dog(Animal):
    def __init__(self, name):
        super().__init__(name)

And if he was using Python 2 he should have been deriving his base classes from object:

Code:

class Animal(object):