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This article mainly explains "there are several formal parameters in the python function", interested friends may wish to have a look. The method introduced in this paper is simple, fast and practical. Now let the editor to take you to learn "there are several parameters in the python function"!

There are two types of parameters in Python function, which are formal parameters and actual parameters. This article introduces the types of formal parameters.

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} so far, I believe you have a deeper understanding of "several formal parameters in the python function". You might as well do it in practice! Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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