Decorator does not work when function is passed as object in a process

Question

I have the following code:

@retry(stop_max_attempt_number=2)
def a_func:
  do_somthing

def a_func_thread:
  process = multiprocessing.Process(target=a_func, args=[])
  process.start()

What I am seeing is that the decorator works when I call a_func directly. But when I use it as a target function in a process, the process does not seem to respect decorators at all. Am I missing something very simple here?

Answer 1

Decorator will always work, because decorator is only called when function is defined, and the result of decorator call is then stored as the function name.

def decorator(fnc):
    def test():
        print "test"
    return test

@decorator
def foo():
    print "foo"

foo() # will print test

At the point of target=a_func , in a_func is the result of calling the @retry decorator.