Python学习之路 —— *args 和**kwargs

2019-11-11 02:56:59

字体：大中小

来源：转载

供稿：网友

当函数的参数不确定时，可以使用*args 和**kwargs，*args 没有key值，**kwargs有key值。

话不多说直接上代码

[python]

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: [python]

arg: 1 another arg: two another arg: 3 **kwargs:[python] 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: [python] arg: 1 another keyword arg: myarg2: two another keyword arg: myarg3: 3 也可以用下面的形式： [python]

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：[python] arg1: 1 arg2: two arg3: 3

[python]

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：[python] view plaincopyprint?arg1: 1 arg2:"two" arg3:3

上一篇：详解Python魔术方法__getitem__、__setitem__、__delitem__、__len__

下一篇：详解Python魔术方法__getitem__、__setitem__、__delitem__、__len__