On 28.04.12 21:16, Brett Cannon wrote:
On Sat, Apr 28, 2012 at 04:08, Nick Coghlan <ncogh...@gmail.com
<mailto:ncogh...@gmail.com>> wrote:
On Sat, Apr 28, 2012 at 6:00 AM, Brett Cannon <br...@python.org
<mailto:br...@python.org>> wrote:
> I'm personally in favour of changing the insertion of '' to
sys.path to
> inserting the cwd when the interpreter is launched.
I'm not, because it breaks importing from the interactive prompt if
you change directory after starting the session.
Who does that? I mean what possible need do you have to start the
interpreter in one directory, but then need to chdir somewhere else
where you are doing your actual importing from, and in a way where you
can't simply attach the directory you want to use into sys.path?
Well, it depends on which hat I'm wearing.
Scenario 1:
I am designing a big application. This application shall run without
problems,
with disambiguated imports, and by no means should hit anything that is not
meant to be imported.
In this case, I need to remove '' from sys.path and replace it with an
absolute entry.
Update: I see this works already unless "-c" and "-m" are present (hum).
Scenario 2:
I am playing with the application, want to try several modules, or even
several versions
of modules. I do use os.chdir() to get into a certain context, try
imports, remove them
again, chdir() to a different directory with a slightly changed module,
et cetera.
In this case, I need '' (or as has been mentioned '.') to have
flexibility for testing,
debugging and exploration.
These scenarios are both perfectly valid for their use case, but they
have pretty
different implication for imports, and especially for sys.path.
So the real question I was after was "can os.chdir() be freely used?"
It would be great to get "yes" or "no", but the answer is right now "it
depends".
cheers - chris
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