python 3.9.7 多版本，包含嵌入式windows和mac版本以及帮助文档，32和64位都有

Python 3.9.7 is the newest major release of the Python programming language, and it contains many new features and optimizations. There's been 187 commits since 3.9.6 which is a similar amount compared to 3.8 at the same stage of the release cycle. See the changelog for details.