How to detect Python Version 2 or 3 in script?
sys.version_info
provides the version of the used Python interpreter.
Python 2
>>> import sys
>>> sys.version_info
sys.version_info(major=2, minor=7, micro=6, releaselevel='final', serial=0)
>>> sys.version_info[0]
2
Python 3
>>> import sys
>>> sys.version_info
sys.version_info(major=3, minor=7, micro=10, releaselevel='final', serial=0)
>>> sys.version_info[0]
3
For details see the documentation.
You can use the six library (https://pythonhosted.org/six/) to make it easier to write code that works on both versions.
(It includes two booleans six.PY2
and six.PY3
which indicate whether the code is running in Python 2 or Python 3)
Also in Python 2.6 and 2.7, you can use
from __future__ import (print_function, unicode_literals, division)
__metaclass__ = type
to enable some of the Python 3 behaviour in a way that works on both 2 and 3.