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Fix putting None in queue - #16

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philipbl wants to merge 3 commits into

Open

Fix putting None in queue#16
philipbl wants to merge 3 commits into
masterfrom
fix_none

Commits on Dec 14, 2016
- Add test to show problem of putting None
  philipbl
  committed
  67f98c0
- Add test for to check for consistent return types
  philipbl
  committed
  bf0710a
- Handle none case
  philipbl
  committed
  3971394