Python @Private decorator

private.py

import sys, functools

def private(member):
    @functools.wraps(member)
    def wrapper(*function_args):
      myself = member.__name__
      caller = sys._getframe(1).f_code.co_name
      if (not caller in dir(function_args[0]) and not caller is myself):
         raise Exception("%s called by %s is private"%(myself,caller))
      return member(*function_args)
    return wrapper

'''
class test:
   def public_method(self):
      print('public method called')

   @private
   def private_method(self):
      print('private method called')

t = test()
t.public_method()
t.private_method()
'''