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- Use six at range().
- Give array type module as argument.
- Define as module functions which do not use self.
- Use list comprehension.

okuta/chainer,hvy/chainer,wkentaro/chainer,ronekko/chainer,pfnet/chainer,sinhrks/chainer,anaruse/chainer,tkerola/chainer,jnishi/chainer,jnishi/chainer,jnishi/chainer,aonotas/chainer,okuta/chainer,sinhrks/chainer,chainer/chainer,ktnyt/chainer,hvy/chainer,wkentaro/chainer,jnishi/chainer,AlpacaDB/chainer,wkentaro/chainer,benob/chainer,okuta/chainer,keisuke-umezawa/chainer,AlpacaDB/chainer,hvy/chainer,chainer/chainer,cupy/cupy,cupy/cupy,chainer/chainer,okuta/chainer,muupan/chainer,ktnyt/chainer,cemoody/chainer,kiyukuta/chainer,kikusu/chainer,ktnyt/chainer,niboshi/chainer,niboshi/chainer,cupy/cupy,kikusu/chainer,niboshi/chainer,kashif/chainer,t-abe/chainer,rezoo/chainer,t-abe/chainer,truongdq/chainer,wkentaro/chainer,keisuke-umezawa/chainer,cupy/cupy,keisuke-umezawa/chainer,delta2323/chainer,hvy/chainer,muupan/chainer,truongdq/chainer,ktnyt/chainer,chainer/chainer,ysekky/chainer,benob/chainer,keisuke-umezawa/chainer,niboshi/chainer