[code-quality] flake8 should check for unused multiple assignments

[Nik Nyby]

Hi,
flake8 2.3.0 warns me when a variable is never actually used, e.g.:
     a = 1

It doesn't seem to check for unused multiple assigments, e.g.:
     obj, created = RefutationResponse.objects.update_or_create(...)

-- 
Nik Nyby
Programmer
Columbia Center for New Media Teaching and Learning
nnyby at columbia.edu | (212) 854-7076