python classmethod/staticmethod with inheritance

gistfile1.py

class Foo():
  message = "I'm Foo class"

  def method(self, foo):
    self.foo = foo
    print self.message

  @classmethod
  def class_method(cls, foo):
    cls.foo = foo
    print cls.message

  @staticmethod
  def static_method(foo):
    Foo.foo = foo
    print Foo.message

class Bar(Foo):
  message = "I'm Bar class"

Foo.class_method(None)
# I'm Foo class
Foo.static_method(None)
# I'm Foo class

Bar.class_method(None)
# I'm Bar class
Bar.static_method(None)
# I'm Foo class