Fix rich comparisons for datetime objects#53

Merged

jswhit merged 3 commits intoUnidata:masterfrom

pdearnshaw:datetime_comparison

Aug 20, 2018

Commits on Jul 9, 2018

Replace TypeError raise with NotImplemented return in order to get rich comparison to work
Paul Earnshaw
committed

Commits on Jul 24, 2018

Added a switch to differentiate Python2 and Python3 behaviour. This fixes the problem for Python3 but leaves the problem for Python2.
Paul Earnshaw
committed
Added a comment to to explain the code changes.
Paul Earnshaw
committed