[Distutils] IBM Developerworks setuptools article - example doesnt work ?

Phillip J. Eby pje at telecommunity.com
Mon Oct 30 23:03:17 CET 2006

At 03:54 PM 10/30/2006 -0500, Michael Bayer wrote:

>On Oct 30, 2006, at 3:00 PM, Bob Ippolito wrote:
> > Feature. It can do multi-version installs, but only if explicitly
> > specified.
> >
> > The problem is that 1.2.1 is already on sys.path, so setuptools gives
> > up because it doesn't know if something is using Gnosis-Utils or not.
> > If the directory *containing* the egg was on sys.path, then it would
> > pick the exact version... but then you must *always* require it before
> > it is imported.
>Ah, terrific.  -m allows this feature, although i wonder why -m then
>makes regular "import", for those scripts that just want the default

When you have multiple versions, there is no such thing as a default version.

Note, however, that if you simply build your main program as a setuptools 
project, and define its dependencies in your setup.py, then you don't need 
to worry about any of this; even if there is a default version it can be 
overridden when the dependency is specified using setuptools.  Most code 
shouldn't call require() at runtime; it should just declare dependencies in 
a setup script, making this whole question a nonissue.

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