python *与**，python,python中，在形

python *与**，python,python中，在形

python中，在形参前面加上“*”与“”“**”，称为动态参数

加“*”时，函数可接受任意多个参数，全部放入一个元祖中

def F(*args):    print(args)F(123,"456")# (123, ‘456‘)

加“**”时，函数接受参数时，返回为字典，需要写为如下形式：

def F(**kwargs):    print(kwargs)F(k1=123,k2="456")# {‘k1‘: 123, ‘k2‘: ‘456‘}

def F(p,*args,**kwargs):    print(p)    print(args)    print(kwargs)F(11,"abc",[789],k1=123,k2="456")# 11# (‘abc‘, [789])# {‘k1‘: 123, ‘k2‘: ‘456‘}

def F(*args):    print(args)li = [11,22,33,44]F(li)F(*li)# ([11, 22, 33, 44],)# (11, 22, 33, 44)

def F(**kwargs):    print(kwargs)li = {"k1":1,"k2":2}F(k=li)F(**li)# {‘k‘: {‘k2‘: 2, ‘k1‘: 1}}# {‘k2‘: 2, ‘k1‘: 1}

python *与**