Entry

How do I set environment variables in a Python script that is to be run on an Apache server?

After setting environment variables in a script will they be changed after running the script?

Aug 25th, 2009 16:45
Joe Bloggs, unknown unknown, Cliff Crawford

Problem:

Say, I want to set ORACLE_HOME = /opt/app/ora/

I wrote the following code:

        import os
        os.system("ORACLE_HOME=/opt/app/ora/")
        os.system("export ORACLE_HOME")
        ....

I executed the script under my user account but
when I checked my enviroment variables with "env"
there is no ORACLE_ENV added.



Solution:

That's because os.system spawns a new process (with a copy of the
original environment of the parent process) each time it's called.  You
want to use os.environ instead:

    os.environ["ORACLE_HOME"]="/opt/app/ora/"

This changes the environment for all future os.system calls.

Once the process dies, the changed environment dies with it.

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