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https://issues.apache.org/jira/browse/AVRO-849?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13087872#comment-13087872
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Jeremy Lewi commented on AVRO-849:
----------------------------------
I'm not sure exactly how the path precedence is determined from PYTHONPATH but
on my system it looks like "eggs" appear higher on the path then directories
obtained from PYTHONPATH.
A simple test
{code}
export PYTHONPATH=/some/dir
python -c 'import sys; print "\n".join(sys.path)'
{code}
In my case the output is
{code}
/usr/lib/python2.7/site-packages/ipython-0.11-py2.7.egg
/usr/lib/python2.7/site-packages/avro-1.6.0_SNAPSHOT-py2.7.egg
/some/dir
/usr/lib64/python27.zip
/usr/lib64/python2.7
...
{code}
So at least in my case, the installed avro egg will take precedence over
(lang/py/{src,test,lib}) directories added via PYTHONPATH.
> Python unittests don't work if avro is already installed
> --------------------------------------------------------
>
> Key: AVRO-849
> URL: https://issues.apache.org/jira/browse/AVRO-849
> Project: Avro
> Issue Type: Bug
> Components: python
> Affects Versions: 1.4.1
> Reporter: Jeremy Lewi
> Assignee: Jeremy Lewi
> Priority: Minor
> Attachments: AVRO-849.patch
>
>
> I think there is a problem running the python unittests if avro is already
> installed. If avro is already installed then when we import avro or its
> subpackages in the unittests we can end up importing the installed avro
> instead of the avro version being compiled because the installed version
> might be higher on the path.
> One (slightly cumbersome way to fix this) would be to pass the the paths
> listed in test.path to our unittests (e.g by using an environment variable).
> The unittests could then adjust the path so these directories were highest on
> the path. The downside of this solution would be every unittest would need
> some boilerplate code to adjust the path.
> Does anyone have suggestions about how to pass the values in test.path to our
> unittests? I don't know anything about ant, so any help would be appreciated.
> Or does anyone have suggestions about a better solution which doesn't require
> adjusting the path in each unittest?
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