classmethod.py

classmethod.py

class Foo:
   x = 2
   @classmethod
   def multy_cls(cls, y):
       return cls.x * y
   def multy(self, y):
       return self.x * y


f1 = Foo()
f2 = Foo()

f1.x = 10
f2.x = 20

print(Foo.x, f1.x, f2.x)            # output: 2 10 20
print(Foo.multy_cls(3))             # output: 6 
print(f1.multy_cls(4), f1.multy(4)) # output: 8 40
print(f2.multy_cls(5), f1.multy(5)) # output: 10 50