sys.version和sys.version_info 查看版本

>>> sys.version '3.6.2 (v3.6.2:5fd33b5926, Jul 16 2017, 20:11:06) \n[GCC 4.2.1 (Apple Inc. build 5666) (dot 3)]' >>> sys.version_info sys.version_info(major=3, minor=6, micro=2, releaselevel='final',

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