Comment 20 for bug 1488315

My findings to the problem:

Pip should always install under /usr/local/lib and the debian packages only on the system libraries (/usr/lib)
When it comes down to this issue, the PYTHONPATH prefers /usr/lib before /usr/local and unfortunately for us,
the request library from Ubuntu is patched in a way not loading urllib3 over the the embedded .packages.urllib3 path.
And I think this is the more important issue since we installed urllib3 in version 1.12 and Ubuntu 1.7.1
Other than that, the requests library from Ubuntu and ours are the same with some minor HTTP proxy fixes.