Version checking in python

version_checker.py

import sys
vers = sys.version_info


...


if vers[0] is 2 and vers[1] is 4:
    f = open('file.txt', 'r')

    try:
        # do stuff with f
    finally:
        f.close()
else:
    with open('file.txt', 'r') as f:
        # do stuff with f