问题
I've written some scripts, which run either only with Version 2.x or some only with Version 3.x of Python.
How can I detect inside the script, if it's started with fitting Python Version?
Is there a command like:
major, minor = getPythonVersion()
回答1:
sys.version_info provides the version of the used Python interpreter:
>>> import sys
>>> sys.version_info
sys.version_info(major=2, minor=7, micro=6, releaselevel='final', serial=0)
>>> sys.version_info[0]
2
For details see https://docs.python.org/2/library/sys.html .
回答2:
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.
来源：https://stackoverflow.com/questions/27376907/how-to-detect-python-version-2-or-3-in-script