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References: <50FE5AC7.3050909@timgolden.me.uk>
Date: Wed, 23 Jan 2013 01:14:15 +0000
Subject: Re: Retrieving the full command line
From: Oscar Benjamin <oscar.j.benjamin@gmail.com>
To: Tim Golden <mail@timgolden.me.uk>
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On 22 January 2013 09:24, Tim Golden <mail@timgolden.me.uk> wrote:
> [Python 2.7/3.3 (and hg tip) running on Windows. Not Windows-specific,
> though].
>
> I use the python -mpackage incantation to run a package which has a
> __main__.py module and which uses relative imports internally.
>
> I'm developing under cherrypy which includes a reloader for development.
> The reloader attempts to rebuild the original
> command line by combining sys.executable and sys.argv and then does an
> execv.
>
> There does not appear to be any way within Python of determining the
> command line I used. The combination of sys.executable and sys.argv in
> this case will look like: "c:\python33\python.exe app/__main__.py". But
> running this precludes the use of package-relative imports.

I tried this on Linux but I imagine that it works the same on Windows.
You can check the value of the __package__ module global:

~$ mkdir tmp
~$ touch tmp/__init__.py
~$ vim tmp/__main__.py
~$ cat tmp/__main__.py
if __package__ is None:
    print 'Running as a script'
else:
    print 'Running with the -m option'
~$ python tmp/__main__.py
Running as a script
~$ python -m tmp
Running with the -m option


Oscar