Env Variable to Auto-Name and Recognize __pycache__ As .__pycache__

Feature or enhancement

Proposal:

Introduce a Bash environment variable (PYTHON_PYCACHE_HIDDEN) that, when set, automatically names and recognizes the __pycache__ directory as .__pycache__. This change aims to improve directory cleanliness by making the __pycache__ directory hidden by default, reducing visual clutter in project directories.

The __pycache__ directory, often clutters project directories. While necessary for Python's efficient execution, it can be an eyesore, especially in larger projects. Making this directory hidden by default would: improve directory readability, maintain compiled functionality, and introduce optional visibility.

Bottom line, __pycache__ directory enhances Python's execution efficiency by storing compiled bytecode, but its contents are rarely useful for regular viewing, cluttering project directories unnecessarily.

Has this already been discussed elsewhere?

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Links to previous discussion of this feature:

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该 issue 未指定文件、测试或入口点。首先定位 CPython 对 pycache 目录命名和识别的处理方式，然后确定环境变量是如何处理的。完成的标准是：可选启用的 PYTHON_PYCACHE_HIDDEN 设置始终使用并识别 .pycache，且不会破坏已编译字节码的行为。