On Thu, Oct 27, 2011 at 11:16 AM, Andrea Crotti
<[email protected]>wrote:
> Answering to myself, I was using the wrong functions for pkg_resources, and
> in theory I should use find_distributions.
> So I tried the following
> - construct a very minimal egg with a foolproof module
> - find and add to the working_set all the distributions found
>
> for d in find_distributions('egg_**directory'):
> working_set.add(d)
>
> from foolproof import fool
>
> And in fact in sys.path the foolproof egg is there, but then I can't still
> import foolproof...
> Is there anything else I need to do?
>
You're making this way too hard. ;-)
All of the APIs you're using are low-level things, used only for advanced
plugin frameworks or installer tools. All you need for a simple script is:
sys.path.insert(0, abspath('egg_directory'))
import pkg_resources
pkg_resources.require('foolproof')
import foolproof
(Note: if you want 'egg_directory' to override the default sys.path, it is
important that you *not* import pkg_resources until after you've set up the
path.)
Also, even the above is *completely unnecessary* as long as the script you
are running is part of a project with its own setup.py.
If your script is listed in a setup.py, and you install it with setup.py
develop or using easy_install, then setuptools creates a wrapper for your
script that does all of the pkg_resources stuff for you automatically, using
the dependences specified in your setup.py. 99% of the time, if you are
using pkg_resources for anything but accessing file resources or
implementing some sort of plugin system, you are probably doing it wrong.
;-)
So, the only reason I'm even listing the above require() call is just in
case you can't run those generated script wrappers easily from inside
Eclipse. And, even if that is the case, you should still make sure your
setup.py includes those dependencies, so that when you distribute your
project the dependencies will still get installed, and a proper wrapper will
be generated during installation.
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