#!/usr/bin/python

# 第1种方法

import platform

print(platform.python_version())

>>> import platform

>>> print(platform.python_version())

3.6.3

# 第2种方法

import sys

print(sys.version)

print(sys.version_info)

>>> import sys

>>> print(sys.version)

3.6.3 (v3.6.3:2c5fed8, Oct  3 2017, 18:11:49) [MSC v.1900 64 bit (AMD64)]

>>> print(sys.version_info)

sys.version_info(major=3, minor=6, micro=3, releaselevel='final', serial=0)

>>> print(sys.version_info.major)

3