How do I use variables in Python classes?

How do I use variables in Python classes?

In Python classes, you can use instance variables and class variables. Instance variables are defined within methods and are unique to each instance, while class variables are shared across all instances.

Can you give me an example of both types of variables?

Sure! Here's a simple example:

class Dog:
    species = "Canis familiaris"  # Class variable

    def __init__(self, name, age):
        self.name = name  # Instance variable
        self.age = age  # Instance variable

my_dog = Dog("Buddy", 3)
print(my_dog.name)  # Outputs: Buddy
print(Dog.species)  # Outputs: Canis familiaris

What happens if I change a class variable?

If you change a class variable, it affects all instances of the class unless an instance variable with the same name is defined. For example, if you set Dog.species = "Canis lupus", all instances will reflect this change.