remove extra import#48

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YoWenqin wants to merge 9 commits intobmcfee:masterfrom

YoWenqin:add-flake8

Commits on Feb 5, 2019

Commits on Feb 7, 2019

add missing tests
Wenqin
committed
add flake 8
Wenqin
committed
comment extra import to pass flake8
Wenqin
committed
test git config reset
WENQIN CHEN
committed
fix travis issue
WENQIN CHEN
committed