Avoid exposing chainerx.Scalar to python
Avoid exposing chainerx.Scalar to python

niboshi/chainer,wkentaro/chainer,okuta/chainer,niboshi/chainer,wkentaro/chainer,keisuke-umezawa/chainer,keisuke-umezawa/chainer,keisuke-umezawa/chainer,hvy/chainer,hvy/chainer,hvy/chainer,chainer/chainer,wkentaro/chainer,chainer/chainer,niboshi/chainer,okuta/chainer,wkentaro/chainer,pfnet/chainer,chainer/chainer,hvy/chainer,okuta/chainer,okuta/chainer,niboshi/chainer,tkerola/chainer,chainer/chainer,keisuke-umezawa/chainer