fix bugs which can't use in python3.; #57

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LiZeB wants to merge 3 commits intoMarvinTeichmann:masterfrom

LiZeB:master

Commits on May 13, 2019

fix the bug which can't use in python3.; Increase the compatibility between python2. and python3.
LiZebi
committed

Commits on May 17, 2019