A class attribute is an attribute of the class rather than an attribute of an instance of the class.
In the code below class_var is a class attribute, and i_var is an instance attribute: All instances of the class have access to class_var, which can also be accessed as a property of the class itself −
class MyClass (object): class_var = 2 def __init__(self, i_var): self.i_var = i_var foo = MyClass(3) baz = MyClass(4) print (foo.class_var, foo.i_var) print (baz.class_var, baz.i_var)
This gives the output
(2, 3) (2, 4)