[Python] [Oldboy] keyword parameters and positional parameters, default parameters, variable length parameters (nameless, famous)

The keyword parameter and positional parameters are defined when the function is called

Keyword parameters are key-value pairs appear, unordered, one more no, less one not

Positional parameters, orderly, one more no, one less.

Mashup: All positional parameters must be on the left side of the keyword parameter

　　

The default parameter is defined in the function definition and can be used without arguments when the function is called.

Variable length parameter: *args, **kwargs

Mixing of variable length parameters and positional parameters

1 defAdd (x, y):2     returnX +y3 defAdd_1 (x=0, Y=1):4     returnX +y5 6 defList_add (x, *args, * *Kwargs):7     Printx8     Printargs9     PrintKwargsTen  One Print "function position parameter%d"% Add (1,3) A Print "function keyword parameter:%d"% Add (x=2, y=4) - Print "function default parameter%d"%add_1 () - Print "function position keyword mash%d"% Add (0, y=2) theList_add (1, 2, 3, 4, name=1) -List_add (1,*[2,3,4],**{"name": 1})

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1 function Position parameter 42function keyword parameter: 63function default Parameter 14function position keyword mash up 2516(2, 3, 4)7{'name': 1}819(2, 3, 4)Ten{'name': 1} One  AProcess finished with exit code 0

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[Python] [Oldboy] keyword parameters and positional parameters, default parameters, variable length parameters (nameless, famous)