I currently have Redhat6.5_64bit installed, which i have the latest version of Python 2.6 installed. I installed Python 2.7 and I am trying to install a program that takes require "argparse" module to start install. The problems I encounter are:

1. it cannot see python2.7 when the install starts, and gives me a message that i need to install python2.7, but it is already installed. The problem is because it is getting "argparse" from /usr/bin/python2.6 but I want it to automatically get it from /usr/local/bin/python2.7.

2. Second issue is, even with python2.7 installed, I still cannot get all my "pip-packages" installed automatically. Especially pyopenssl, rpyc, web.py, ....

I have tried the symlink, which worked when I entered $python -V
even when I entered
$/usr/local/bin/python2.7
>>import argparse
>>
but when I try to install the program, it still says that it cannot locate the module argparse,and my currenty version of python is still python2.6.

Im lost.

The "real" answer to having multiple pythons installed on your system is virtualenv:
https://pypi.python.org/pypi/virtualenv

That's probably how you should fix this problem. But maybe it's not what you want, so:

If you've made python2.7 the default for when you execute 'python' then that is calling python2.7 but the system is still pointing to the default libraries that the original python installed came with.

In .bashrc or .bash_profile put in this:

PYTHONPATH=/usr/lib/python2.7/site-packages/:/usr/lib/python2.6/site-packages/
(and so on; it depends on what you want in your python path)

now if you execute 'python' (assuming it's still linked to /usr/local/bin/python2.7) the FIRST place it will look is /usr/lib/python2.7/blah instead of 2.6

1 members found this post helpful.

notKlaatu

Thank you for that response, and yes, I did change the Path to get what I was interested in. Thank you again.