Question

Is it possible to find out if a function is decorated at runtime? For example could I find all functions in a module that are decorated by “example”?

@example
def test1():
    print "test1"

Answer 1

In the general case it is not possible because the example decorator might not leave any trace that’s detectable at runtime — for example, it could be

def example(f):
  return f

If you do control the source for example, it’s of course easy to make it mark or record the functions it’s decorating; if you don’t, it may be utterly impossible to do what you want.