code: def _wrap_key(function, args, kws):
  	'''
  	get the key from the function input.
  	'''
  	return hashlib.md5(pickle.dumps((_from_file(function) + function.__name__, args, kws))).hexdigest(f _wrap_key(function, args, kws):
  	'''
  	get the key from the function input.
  	'''
  	return hashlib.md5(pickle.dumps((_from_file(function) + function.__name__, args, kws))).hexdigest()
docs: get the key from the function input.