[Letsencrypt-devel] Bug#807825: ImportError: cannot import name range

[Harlan Lieberman-Berg]

Aha!  I think that log may have broken the case wide open!

It looks like you have a version of python-requests installed from pip
that ships its own version of the six module, and is shadowing the
Debian version of requests.
(/usr/local/lib/python2.7/dist-packages/requests)

Can you try either removing it, or running letsencrypt with PYTHONPATH
set to exclude /usr/local/lib?

Sincerely,

-- 
Harlan Lieberman-Berg
~hlieberman