[Python-Dev] Bilingual scripts
barry at python.org
Tue May 28 19:30:58 CEST 2013
On May 25, 2013, at 03:12 AM, Chris McDonough wrote:
>You probably already know this, but I'll mention it anyway. This
>probably matters a lot for nose and pyflakes, but I'd say that for tox
>it should not, it basically just scripts execution of shell commands.
>I'd think maybe in cases like tox (and others that are compatible with
>both Python 2 and 3) the hashbang should just be set to
Unfortunately, not entirely so:
>Maybe we could also think about modifying pyflakes so that it can
>validate both 2 and 3 code (choosing one or the other based on a header
>line in the validated files and defaulting to the version of Python
>being run). This is kind of the right thing anyway.
Agreed. Auto-detection may need to be accompanied by a command line option to
override in some cases. But I agree, that in general, it would be very nice
if the script itself were actually bilingual. (But then, see my previous
comment about cross-interpreter dependencies.)
>Nose is a bit of a special case. I personally never run nosetests
>directly, I always use setup.py nosetests, which makes it not matter.
Which is morally equivalent to `$python -m nose`.
>In general, I'd like to think that scripts that get installed to global
>bindirs will execute utilities that are useful independent of the
>version of Python being used to execute them.
Agreed. I'm trying to tease out some conventions we can recommend for when
this can't be the case for whatever reason.
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