Fix for python 2 #266

Job	Run time
Create sdist and Python 3 Wheel	35s
Create Python 2 Wheel	1m 35s
Test Documentation	35s
test_typing (sdist)	33s
test_typing (wheel)	39s
Test Package (2.7, sdist)	25s
Test Package (2.7, wheel)	19s
Test Package (3.3, sdist)	21s
Test Package (3.3, wheel)	15s
Test Package (3.4, sdist)	25s
Test Package (3.4, wheel)	15s
Test Package (3.5, sdist)	19s
Test Package (3.5, wheel)	18s
Test Package (3.6, sdist)	18s
Test Package (3.6, wheel)	15s
Test Package (3.7, sdist)	26s
Test Package (3.7, wheel)	20s
Test Package (3.8, sdist)	21s
Test Package (3.8, wheel)	18s
Test Package (3.9, sdist)	28s
Test Package (3.9, wheel)	25s
Test Package (3.10, sdist)	27s
Test Package (3.10, wheel)	40s
Test Package (3.11, sdist)	38s
Test Package (3.11, wheel)	29s
Test Package (3.12, sdist)	34s
Test Package (3.12, wheel)	37s
	12m 50s

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