Fix choose method for readability
Fix choose method for readability

tkerola/chainer,cupy/cupy,niboshi/chainer,hvy/chainer,chainer/chainer,jnishi/chainer,aonotas/chainer,jnishi/chainer,chainer/chainer,delta2323/chainer,niboshi/chainer,ktnyt/chainer,niboshi/chainer,kiyukuta/chainer,cupy/cupy,kashif/chainer,okuta/chainer,keisuke-umezawa/chainer,jnishi/chainer,jnishi/chainer,okuta/chainer,keisuke-umezawa/chainer,ysekky/chainer,wkentaro/chainer,keisuke-umezawa/chainer,chainer/chainer,ktnyt/chainer,pfnet/chainer,chainer/chainer,ronekko/chainer,cupy/cupy,rezoo/chainer,hvy/chainer,wkentaro/chainer,hvy/chainer,ktnyt/chainer,wkentaro/chainer,niboshi/chainer,hvy/chainer,okuta/chainer,ktnyt/chainer,cupy/cupy,anaruse/chainer,okuta/chainer,wkentaro/chainer,keisuke-umezawa/chainer