replace asserts with ValueError or TypeError#709

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dwalton76 wants to merge 3 commits intoev3dev:ev3dev-stretchfrom dwalton76:assert-cleanup

+83-60

Commits on Jan 11, 2020

Commits on Jan 15, 2020

Merge branch 'ev3dev-stretch' of https://github.com/dwalton76/ev3dev-lang-python into assert-cleanup
dwalton76
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