Add python wrapper for open_files_op
Add python wrapper for open_files_op

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