Squashed 'mysqlconnpool/' changes from 3f91923..775578b
Squashed 'mysqlconnpool/' changes from 3f91923..775578b

775578b fix pyflakes warning

git-subtree-dir: mysqlconnpool
git-subtree-split: 775578bbe563db390570c1131cd7dccf30592a33

baishancloud/pykit,breakwang/pykit,breakwang/pykit,sejust/pykit,sejust/pykit,baishancloud/pykit