$PYTHONSTARTUP with python 2.7 and python 3.2

问题:

I finally started using python 3 alongside python 2.7 on Linux.

I setup my python shell using a startup-script defined by $PYTHONSTARTUP. Due to incompatibilities I am unable to use the same script for both versions.

What is the easiest way to get one script for python 2.7, and another for python 3.2?

回答1:

If you use Python 2 for some projects and Python 3 for others, then change the environment variable when you change projects.

Or, have your startup script look like this:

import sys if sys.version_info[0] == 2:     import startup2 else:     import startup3 

and split your real startup code into startup2.py and startup3.py

回答2:

Set your $PYTHONSTARTUP to point to a script like this, which checks the version of Python being used, and then delegates to another startup script:

import sys if sys.version_info[0]==2:     from startup2k import * elif sys.version_info[0]==3:     from startup3k import * else:     # logging.warn('Unsupported version of Python')     pass 

回答3:

Define an alias for one of the python versions. In the alias, reset PYTHONSTARTUP as appropriate for that python version:

alias py3='PYTHONSTARTUP=/path/to/startup.py /other/path/to/python3.2' 

文章来源: $PYTHONSTARTUP with python 2.7 and python 3.2