Python Indeterminate parameter function

1. Tuple form

def test1 (*args): Print (    ' ############### #test1 ################ ') print (    type (args))    print (args)

Call correctly:

Test1 (1, 2) #args在函数体内部为tuple类型

Error Call:

Test1 (1, b=2) #TypeError: Test1 () got an unexpected keyword argument ' b '
Test1 (A=1, b=2) #TypeError: Test1 () got an unexpected keyword argument ' a '
Test1 (A=1, 2) #TypeError: Test1 () got an unexpected keyword argument ' a '

2. Dictionary form

def test2 (**kargs): Print (    ' ############### #test2 ################ ') print (    type (Kargs))    print (Kargs)

Correct adjustment :

Test2 (A=1, b=2) #kargs在函数体内部为dict类型

Error Call:

Test2 (1, 2) #TypeError: Test2 () takes exactly 0 arguments (2 given)
Test2 (1, b=2) #TypeError: Test2 () takes exactly 0 arguments (2 given)
Test2 (A=1, 2) #SyntaxError: non-keyword arg after keyword arg

3. Mixed form

def test3 (*args, **kargs): Print (    ' ############### #test3 ################ ') print (    type (args))    print ( args) print (    type (Kargs))    print (Kargs

Call correctly:

Test3 (1, 2) #args在函数体内部为tuple类型, Kargs is an empty dict type
Test3 (1, b=2) #args在函数体内部为tuple类型, Kargs for dict type
Test3 (A=1, b=2) #args在函数体内部为空tuple类型, Kargs to Dict type

Error Call:

Test3 (A=1, 2) #SyntaxError: non-keyword arg after keyword arg

Practice:

1 defTest (num,*args,**Kwargs):2     Print('---test1---%d'%num)3     Print('---test2---', args)4     Print('---test3---', Kwargs)5 6Test (100)7Test (100,200)8Test (100,200,300,MM=100)

Answer:

 1  c:\>python test.py   2 ---test1---100 3 --- Test2--- ()   4 ---test3--- {}   5   6 --- Test1---100 7 ---test2---(200  8 ---test3--- {}   9  10 ---test1---10011 ---test2---( 300)  12 ---test3---{"  mm   ' : ' 

Python Indeterminate parameter function