1. 安装装饰器模块：

   $ pip install decorator

2. 修改以下内容的定义

   args_as_ints()

   ：

   import decorator

   @decorator.decorator
   def args_as_ints(f, args, kwargs):
   args = [int(x) for x in args]
   kwargs = dict((k, int(v)) for k, v in kwargs.items())
   return f(args, **kwargs)
   

   @args_as_ints
   def funny_function(x, y, z=3):
   “”“Computes xy + 2z”“”
   return xy + 2z

   print funny_function(“3”, 4.0, z=”5”)

   22

   help(funny_function)

   Help on function funny_function in module main:

   funny_function(x, y, z=3)

   Computes xy + 2z

Python 3.4以上

functools.wraps()

import functoolsdef args_as_ints(func):    @functools.wraps(func)    def wrapper(*args, **kwargs):        args = [int(x) for x in args]        kwargs = dict((k, int(v)) for k, v in kwargs.items())        return func(*args, **kwargs)    return wrapper@args_as_intsdef funny_function(x, y, z=3):    """Computes x*y + 2*z"""    return x*y + 2*zprint(funny_function("3", 4.0, z="5"))# 22help(funny_function)# Help on function funny_function in module __main__:## funny_function(x, y, z=3)#     Computes x*y + 2*z

functools.wraps()

help(funny_function)# Help on function funny_function in module __main__:## funny_function(*args, **kwargs)#    Computes x*y + 2*z

注意：

*args, **kwargs

x, y, z=3