[arch-general] simple trick to make dealing with python 2/3 scripts easier

[Δημήτρης Ζέρβας]

but which of is going to be executed?
/usr/bin or /usr/local/bin?

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On Fri, Aug 17, 2012 at 9:09 PM, Ben Booth <benwbooth at gmail.com> wrote:

> Lots of python scripts still use #!/usr/bin/python instead of explicitly
>> stating which version of python to use. Here's quick trick to make running
>> various python version 2 or 3 scripts easier:
>>
>> remove the /usr/bin/python symlink and replace with this shell script:
>>
>> #!/usr/bin/env bash
>> exec /usr/bin/"${PYTHON:-python3}" "$@"
>>
>> Now you can set the PYTHON environment variable to be either python2 or
>> python3, depending on which version of python the script expects. Just
>> don't
>> set PYTHON=python, or you'll get a recursive loop! The only problem with
>> this approach is that /usr/bin/python is owned by the python package, so
>> if
>> you upgrade the python package it might create problems. Any one know of
>> some way to work around this problem?
>>
>>
>