Automatically clean up cached downloads

Background

According to the documentation, the download_dir directory "is a temporary cache, and can be cleaned up from time to time."

Details

If the download_dir directory is a temporary cache, wouldn't it make sense for the default to be %TEMP%\Python (or something similar), rather than a subdirectory of the global_dir directory?

Why?

1. Files in %TEMP% should be assumed to be temporary (hence the name), so wouldn't it make sense to put temporary downloads there?

2. Files in %TEMP% are, I believe, subject to the Windows automatic "clean up temporary files" feature, aren't they? In this way, old downloads would get cleaned up automatically, wouldn't they? (I'm not an expert on this feature, so I may be all wet here.)

I'm new to this project, so I'm sure others will set me straight if I'm way off here...

首先跟踪 download_dir 和 global_dir 的默认值在哪里定义和读取，并阅读链接的 Windows 管理配置文档。检查 Windows 临时文件清理如何应用于所提议的位置；只有在达成默认位置共识、记录行为，并对最终配置进行测试或验证后，才算完成。