Change the type of conv2d in Python API.
Change the type of conv2d in Python API.

putcn/Paddle,PaddlePaddle/Paddle,PaddlePaddle/Paddle,Canpio/Paddle,QiJune/Paddle,QiJune/Paddle,reyoung/Paddle,jacquesqiao/Paddle,lcy-seso/Paddle,Canpio/Paddle,PaddlePaddle/Paddle,tensor-tang/Paddle,putcn/Paddle,luotao1/Paddle,reyoung/Paddle,chengduoZH/Paddle,jacquesqiao/Paddle,Canpio/Paddle,baidu/Paddle,QiJune/Paddle,lcy-seso/Paddle,luotao1/Paddle,pkuyym/Paddle,Canpio/Paddle,jacquesqiao/Paddle,luotao1/Paddle,baidu/Paddle,putcn/Paddle,putcn/Paddle,tensor-tang/Paddle,reyoung/Paddle,baidu/Paddle,jacquesqiao/Paddle,pkuyym/Paddle,chengduoZH/Paddle,luotao1/Paddle,Canpio/Paddle,tensor-tang/Paddle,luotao1/Paddle,lcy-seso/Paddle,putcn/Paddle,pkuyym/Paddle,PaddlePaddle/Paddle,PaddlePaddle/Paddle,luotao1/Paddle,lcy-seso/Paddle,pkuyym/Paddle,chengduoZH/Paddle,lcy-seso/Paddle,tensor-tang/Paddle,QiJune/Paddle,baidu/Paddle,chengduoZH/Paddle,jacquesqiao/Paddle,chengduoZH/Paddle,putcn/Paddle,PaddlePaddle/Paddle,reyoung/Paddle,jacquesqiao/Paddle,reyoung/Paddle,QiJune/Paddle,tensor-tang/Paddle,luotao1/Paddle,PaddlePaddle/Paddle,baidu/Paddle,Canpio/Paddle,pkuyym/Paddle,Canpio/Paddle,lcy-seso/Paddle,reyoung/Paddle,pkuyym/Paddle,QiJune/Paddle,Canpio/Paddle