【Python】如何正确使用下划线underscore

原文： https://www.xingyulei.com/post/py-dunder/

Underscore Naming

Single Leading Underscore:

_var

Indicating a name is protected, for internal use、Not enforced by python interpreter

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Double Leading Underscore:

__varIndicating a name is private、Enforced by interpreter, attempt to call it will trigger AttributeError

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Double Leading Trailing Underscore:

__var__Special methods (magic methods) defined by python language, avoid naming your own attribute

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Single Trailing Underscore:

var_Avoid naming conflict with python keywords

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Single Underscore:

_Temporary variable name, variables that are never usedExample:

a, b, c, d = ([] for _ in range(4))for _ in random_list: some_operation()

Reference

Dan Bader - The Meaning of Underscores in Python

Tutorials Teacher - Python - Public, Protected, Private Members