Diego Velasco's questions

What is the difference between an instance attribute/property and a class attribute/property? When do I use one and when do I use another in Python?

That is, if we have:

class Foo:
    a = 5

    def print_a(self):
        print(self.a)

Y:

class Foo:
    def __init__(self):
        self.a = 5

    def print_a(self):
        print(self.a)

What differences are there with respect to the attribute a?

It's that I have a little knowledge of Poo and I programmed in Python, but I haven't really seen when to use the classes, I've never used them in my practices (I'm just a student) but I would like to know when to use them and what would be the better way. Thanks.