怎样判断当前py文件在什么版本的python环境下运行？

Question

搜关键词搜不准，都是搜到直接在shell环境下运行python -v，关键是我要在程序里用到版本信息做判断呢，该怎么写呢？

Answer 1

查下manual就可以知道了，有多个类似变量可用

sys.version 
A string containing the version number of the Python interpreter plus additional information on the build number and compiler used. This string is displayed when the interactive interpreter is started. Do not extract version information out of it, rather, use version_info and the functions provided by the platform module.