gistfile1.py

def decorator(fn):
	def f():
		return "dec" + fn()
	f.decorated=True
	f.original_func = fn
	return f
	
def decorator_override(fn):
	def f():
		if fn.decorated:
			return "ovr" + fn.original_func()
		else:
			return "fresh" + fn()
	f.decorated=True
	f.original_func=fn
	return f
	
@decorator_override
@decorator
def hello_ovr():
	return "hello"
	
hello_ovr()
# 'ovrhello'

@decorator
def hello():
  return "hello"
  
hello()
# 'dechello'