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From: Ian Kelly <ian.g.kelly@gmail.com>
Date: Sun, 24 Nov 2013 02:50:37 -0700
Subject: Re: Importing by file name
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On Sun, Nov 24, 2013 at 2:18 AM, Christian Gollwitzer <auriocus@gmx.de> wrote:
> Am 24.11.13 04:41, schrieb Chris Angelico:
>
>> As part of a post on python-ideas, I wanted to knock together a quick
>> little script that "imports" a file based on its name, in the same way
>> that the Python interpreter will happily take an absolute pathname for
>> the main script.
>
>
> Is it imp.load_source() that you are looking for?

That appears to work, but I note that it's undocumented and seems to
be used internally only by the deprecated load_module function.  I
expect it will likely be removed in Python 3.5.

> Modifying sys.path is only necessary because the file could further import
> modules from the same path.

This won't work if the imported file is part of a package and attempts
to import another module in the same package (unless it uses the old
relative import syntax, which was removed in Python 3).