The difference between *args and **args in Python

Source: Internet
Author: User

On a piece of code, let's feel it.

def test_param (*args):

Print (args)

def test_param2 (**args):

Print (args)

Test_param (' test1 ', ' test2 ')

>>> (' test1 ', Test2 ')

Test_param2 (p1= ' test1 ', p2= ' test2 ')

>>>{' p1 ': ' test1 ', ' P2 ': ' Test2 '}

Python provides two special ways to define the parameters of a function:

1. Position parameter *args, collect the parameters into a tuple as the variable args
def Show_args (*args): = = How_args ("Hello", "World")

2. Keyword parameter **kwargs, is a normal Python dictionary type, containing the parameter name and value
def Show_kwargs (**args): = > Show_kwargs (foo= "bar", spam= "eggs")

The difference between *args and **args in Python

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