Comment 3 for bug 1660508

Trying to work around the issue with a

#pip uninstall transaction # <-- that package was not installed on my system!
pip uninstall zope.interface
pip install transaction
pip install zope.interface

as taken from http://stackoverflow.com/questions/40583855/importerror-no-module-named-zope-interface

output:

root@lat61:~# pip uninstall zope.interface
Uninstalling zope.interface-4.1.3:
  /usr/lib/python2.7/dist-packages/zope.interface-4.1.3.egg-info
Proceed (y/n)? y
  Successfully uninstalled zope.interface-4.1.3
root@lat61:~# pip install transaction
Collecting transaction
  Downloading transaction-2.0.3.tar.gz (72kB)
    100% |████████████████████████████████| 81kB 761kB/s
Collecting zope.interface (from transaction)
  Downloading zope.interface-4.3.3.tar.gz (150kB)
    100% |████████████████████████████████| 153kB 1.4MB/s
Requirement already satisfied: setuptools in /usr/local/lib/python2.7/dist-packages/setuptools-18.1-py2.7.egg (from zope.interface->transaction)
Installing collected packages: zope.interface, transaction
  Running setup.py install for zope.interface ... done
  Running setup.py install for transaction ... done
Successfully installed transaction-2.0.3 zope.interface-4.3.3

That said, transaction got installed and zope.interface got updated from 4.1.3 to 4.3.3.

Let's see how that works out. I'll report back.