Use io instead codecs
Use io instead codecs

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