Python version is displayed on console immediately as you start interpreter from command line
C:\Users\acer>python Python 3.6.1 (v3.6.1:69c0db5, Mar 21 2017, 18:41:36) [MSC v.1900 64 bit (AMD64)] on win32 Type "help", "copyright", "credits" or "license" for more information.
Version information is present in version attribute defined in sys module
>>> import sys >>> sys.version '3.6.1 (v3.6.1:69c0db5, Mar 21 2017, 18:41:36) [MSC v.1900 64 bit (AMD64)]'
Another attribute version_info is more elaborate. It provides major, minor and micro version levels.
>>> import sys >>> sys.version_info sys.version_info(major=3, minor=6, micro=1, releaselevel='final', serial=0)
There is also hexversion attribute which provides a unique number associated with the version. If converted using hex() function, it indicates the version.
>>> sys.hexversion 50725360 >>> hex(50725360) '0x30601f0'