[Discuss] Python script question

[abreauj at gmail.com (John Abreau)]

Under Fedora/CentOS/RHEL, this is in the repos as

    environment-modules



On Wed, Aug 3, 2011 at 6:31 PM, Shankar Viswanathan
<shankar.viswan at gmail.com> wrote:
> On Wed, Aug 3, 2011 at 10:28 AM, Jerry Feldman <gaf at blu.org> wrote:
>> A coworker of mine has a Python script set up as:
>> #! $PATH_TO_PYTHON/python
>> ... python code
>>
>> It is not unusual to have commands like this. Mailman does this with
>> several of its commands. The issue here is that he needs to use an
>> environment variable to call the python interpreter. We certainly can do
>> it a messy way:
>> #! /bin/bash
>> $PATH_TO_PYTHON/python foo.py
>>
>> But this would require a wrapper script.
>>
>> Or he can use an explicit path to the python interpreter.
>> #! /usr/bin/python
>>
>> The problem here is that the version of python he uses MUST be
>> encapsulated in our company's product.
>> #! /mnt/fubar/versionxyz/bin/python
>>
>> But this will possibly differ with each release of our company's product
>> since we maintain a number of releases here. ?Some other solutions is to
>> set up symlinks in the local directory.
>>
>> Any ideas on how to get the loader to expand the environment variable
>> after the #!??
>
> At work, we use the 'modules' system to solve this problem:
> http://modules.sourceforge.net/
>
> We put the list of modules and versions needed for a project in a
> .bashrc file that we customize for each project/customer. You just
> have to load the specific .bashrc file for your project, which can
> also contain other environment variables in addition to the modules.
>
> The python script can then simply have:
> #!/usr/bin/env python
> <python code>
>
> This has proved very flexible and versatile system for us when dealing
> with multiple tools, both internal and those from external vendors.
> You just have to spend some time initially creating the modulefile for
> each tool.
>
> Hope this helps,
> Shankar
> _______________________________________________
> Discuss mailing list
> Discuss at blu.org
> http://lists.blu.org/mailman/listinfo/discuss
>



-- 
John Abreau / Executive Director, Boston Linux & Unix
GnuPG KeyID: 0xD5C7B5D9 / Email: abreauj at gmail.com
GnuPG FP: 72 FB 39 4F 3C 3B D6 5B E0 C8 5A 6E F1 2C BE 99