[fix] pep8
[fix] pep8

okuta/chainer,jnishi/chainer,okuta/chainer,niboshi/chainer,wkentaro/chainer,okuta/chainer,niboshi/chainer,keisuke-umezawa/chainer,niboshi/chainer,hvy/chainer,ronekko/chainer,hvy/chainer,ktnyt/chainer,jnishi/chainer,jnishi/chainer,anaruse/chainer,chainer/chainer,pfnet/chainer,jnishi/chainer,keisuke-umezawa/chainer,okuta/chainer,ktnyt/chainer,rezoo/chainer,wkentaro/chainer,ktnyt/chainer,tkerola/chainer,chainer/chainer,niboshi/chainer,ktnyt/chainer,keisuke-umezawa/chainer,chainer/chainer,wkentaro/chainer,keisuke-umezawa/chainer,chainer/chainer,hvy/chainer,wkentaro/chainer,hvy/chainer