how to ensure python version is picked from /usr/bin/python

Question

I have the following in my shell script ,i have a python version present in /prj/qct/asw/SA/Linux which is overwriting the default one /usr/bin/python,how do I ensure python version is picked from /usr/bin/python with still exporting the KWTOOLS_DIR ?

export KWTOOLS_DIR=${KWTOOLS_DIR:-"/prj/qct/asw/SA/Linux"}
export PATH=${KWTOOLS_DIR}/Klocwork/Server/bin:$PATH 

Answer 1

You can ensure that the path of your python installation appears earliest in the PATH,

export KWTOOLS_DIR=${KWTOOLS_DIR:-"/prj/qct/asw/SA/Linux"}
export PATH=$PATH:${KWTOOLS_DIR}/Klocwork/Server/bin 

or you could use environment management tools such as virtualenv. I'd suggest the latter as it helps you isolate your python installations and the various dependency sets you might have for a given python install or version.

You can also start your individual scripts with the version you want to use:

#! /usr/bin/python

More detail on that route is here

other questions posed slightly differently but that might have the same answers:

regarding usr/bin/env

usage of #!

more usage of #!