Python dict list 做函数参数

 

#  dict做参数,关键字做参数
d = {'a':1}
def foo(**arg):
    print arg, type(arg)
    
foo(a=1)
foo(**d)

#  list  tuple 做参数
l = [1,2,3]
t = (1,2,3)
def  foo2(*arg):
    print arg, type(arg)

foo2(*l)
foo2(*t)
foo2(1,2,3)

#执行结果
{'a': 1} <type 'dict'>
{'a': 1} <type 'dict'>
(1, 2, 3) <type 'tuple'>
(1, 2, 3) <type 'tuple'>
(1, 2, 3) <type 'tuple'>