python函数可变参数*args和**kwargs区别
#*args(元组列表)和**kwargs(字典)的区别
def tuple_test(*args): for i in args: print 'hello'+i s=('xuexi','mili') tuple_test(*s)
结果
helloxuexi
hellomili
def dict_test(**kwargs): for i in kwargs: print i,kwargs[i] ss={'name':'xuexi',"nick":'0000'} dict_test(**ss)
结果:
nick 0000
name xuexi
3,可变参数和关键字参数
def func(*args, **kwargs): return sum(args) + sum(kwargs.values()) args = [1, 2] kwargs = {'a':3, 'b':4} func(*args, **kwargs) # => 3+7 10 args = [] kwargs = {'a':3, 'b':4, 'c': 5} func(*args, **kwargs) # =>0+12 12
https://blog.csdn.net/parameter_/article/details/78555470
def foo(*args,**kwargs):
print 'args is',args
print 'kwargs is',kwargs
foo(1,2)
foo(k=1,w=2,a=3,r=4,g=5,s=6)
foo(1,2,a=1,b=2,c=2)
foo('a',1,None,a=1,b='2',c=3)
结果
args is (1, 2)
kwargs is {}
args is ()
kwargs is {'a': 3, 'g': 5, 'k': 1, 's': 6, 'r': 4, 'w': 2}
args is (1, 2)
kwargs is {'a': 1, 'c': 2, 'b': 2}
args is ('a', 1, None)
kwargs is {'a': 1, 'c': 3, 'b': '2'}