We use pkg_resources.require() in Tahoe solely in order to get better
and earlier error messages in the case of missing or wrong-version
dependencies:
http://allmydata.org/trac/tahoe/browser/_auto_deps.py?rev=2968#L22
"""
The purpose of this function is to raise a pkg_resources exception if
any of the
requirements can't be imported. This is just to give earlier and
more explicit error
messages, as opposed to waiting until the source code tries to import
some module from one
of these packages and gets an ImportError. This function gets called
from
src/allmydata/__init__.py .
"""
We are considering experimenting with the multi-version feature of
eggs, but haven't tried it yet.
pkg_resources.require() is not particularly problematic for us as far
as I recall.
Regards,
Zooko
---
http://allmydata.org -- Tahoe, the Least-Authority Filesystem
http://allmydata.com -- back up all your files for $5/month
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