[Distutils] version conflict

[Robin Becker]

Hi,

a user is trying to install reportlab and is getting an error I have not seen ie

pkg_resources.VersionConflict: (certifi 2015.11.20.1 
(/Library/Python/2.7/site-packages), Requirement.parse('certifi==2015.11.20'))

the full traceback is visible here

https://bitbucket.org/rptlab/reportlab/issues/73/versionconflict

anyone here that can explain what's wrong? My pip installs of reportlab don't 
use any certifi packages etc etc.
-- 
Robin Becker