use (1, 'iteration') if  arg is None
use (1, 'iteration') if  arg is None

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