Here is the situation: I've been playing around with new versions of
Sphinx. If I've installed a new version and then go back to an old version,
the directory local/lib/python2.7/site-libraries/sphinx/ is not removed and
then recreated, but instead the changed files are reinstalled, leaving
remnants of the previous version there. Is this how things are supposed to
work?
In this particular case, things break: in both versions of Sphinx, there is
a file sphinx/util/parallel.py which has the line
from math import sqrt
In the new version of Sphinx, there is a file sphinx/util/math.py, but
sphinx/util/parallel.py also has the line from __future__ import
absolute_import, so no confusion. In the old version of Sphinx, the
absolute_import line is not there. In a better world, sphinx/util/math.py
would be removed when I install the old version (since it belongs to the
new version, not the old), but it remains, so parallel.py tries and fails
to import sqrt from this file.
--
John
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