Python中*args 和**kwargs的用法，pythonkwargs,def fun_var_

Python中*args 和**kwargs的用法，pythonkwargs,def fun_var_

def fun_var_args(farg, *args):      print "arg:", farg      for value in args:          print "another arg:", value  fun_var_args(1, "two", 3) # *args可以当作可容纳多个变量组成的list  

                                result:

arg: 1  another arg: two  another arg: 3  

                                **kwargs:

def fun_var_kwargs(farg, **kwargs):      print "arg:", farg      for key in kwargs:          print "another keyword arg: %s: %s" % (key, kwargs[key])  fun_var_kwargs(farg=1, myarg2="two", myarg3=3) # myarg2和myarg3被视为key， 感觉**kwargs可以当作容纳多个key和value的dictionary  

                                result:

arg: 1  another keyword arg: myarg2: two  another keyword arg: myarg3: 3  

                                也可以用下面的形式：

def fun_var_args_call(arg1, arg2, arg3):      print "arg1:", arg1      print "arg2:", arg2      print "arg3:", arg3  args = ["two", 3] #list  fun_var_args_call(1, *args)  

                                result：

arg1: 1  arg2: two  arg3: 3  

def fun_var_args_call(arg1, arg2, arg3):      print "arg1:", arg1      print "arg2:", arg2      print "arg3:", arg3  kwargs = {"arg3": 3, "arg2": "two"} # dictionary  fun_var_args_call(1, **kwargs)  

                                result：

arg1: 1  arg2:"two"  arg3:3