Why can @decorator not decorate a staticmethod or a classmethod?

Question

Why can decorator not decorate a staticmethod or a classmethod?

from decorator import decorator

@decorator
def print_function_name(function, *a         


        

Answer 1

It works when @classmethod and @staticmethod are the top-most decorators:

from decorator import decorator

@decorator
def print_function_name(function, *args):
    print '%s was called.' % function.func_name
    return function(*args)

class My_class(object):
    @classmethod
    @print_function_name
    def get_dir(cls):
        return dir(cls)
    @staticmethod
    @print_function_name
    def get_a():
        return 'a'