Cast the given grads to a tuple
Cast the given grads to a tuple

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