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https://www.python.org/downloads/windows/
1、windows下载链接
https://www.python.org/ftp/python/3.6.8/python-3.6.8-amd64.exe
2、macos下载
https://www.python.org/downloads/mac-osx/
3、macos下载链接
https://www.python.org/ftp/python/3.6.8/python-3.6.8-macosx10.9.pkg
4、源码下载
https://www.python.org/downloads/source/