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This article introduces the relevant knowledge of "what are the formal parameters in the python function". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

1. Position parameter, the actual parameter is required.

Def func01 (p1, p2, p3): print (p1, p2, p3) # func01 () # error func01 (1,2,3) # 1 2 3

2. Asterisk tuple parameters, which automatically merge multiple arguments into one tuple.

Only location arguments are supported.

Def func03 (* args): # just use args to name variables. The asterisk modifies the input. Print (args) func03 () # tuple () func03 (1min2) # tuple (1min2)

3, the default parameter, the actual parameter is optional, each parameter has a default value.

Whether it is the default parameter or not is based on whether there is a default value.

Def func02 (p1 / 2, p2 / 3): print (p1, p2, p3) func02 () # 1 2 3func02 (0) # 02 3func02 (p2 / 0) # 1 03

4. Double asterisk tuple parameters, which automatically merge multiple arguments into tuples.

Only keyword arguments are supported.

Def func04 (* * kwargs): # just use kwargs to name variables. Double asterisk modifies input. Print (kwargs) func04 () # dict () func04 (p1room1, p2room2) # {'p1arguments: 1,' p2arguments: 2} "what are the formal parameters in the python function", thank you for reading. If you want to know more about the industry, you can follow the website, the editor will output more high-quality practical articles for you!

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