use yapf to format python code, add style config file
use yapf to format python code, add style config file

pengli09/Paddle,jacquesqiao/Paddle,gangliao/Paddle,helinwang/Paddle,luotao1/Paddle,reyoung/Paddle,wen-bo-yang/Paddle,cxysteven/Paddle,dayhaha/Paddle,PaddlePaddle/Paddle,luotao1/Paddle,wen-bo-yang/Paddle,jacquesqiao/Paddle,helinwang/Paddle,pengli09/Paddle,dayhaha/Paddle,luotao1/Paddle,alvations/Paddle,beckett1124/Paddle,luotao1/Paddle,baidu/Paddle,Canpio/Paddle,emailweixu/Paddle,helinwang/Paddle,lispc/Paddle,qingqing01/Paddle,Canpio/Paddle,cxysteven/Paddle,lispc/Paddle,gangliao/Paddle,pkuyym/Paddle,alvations/Paddle,pkuyym/Paddle,putcn/Paddle,dayhaha/Paddle,tensor-tang/Paddle,wen-bo-yang/Paddle,QiJune/Paddle,lispc/Paddle,luotao1/Paddle,wen-bo-yang/Paddle,tensor-tang/Paddle,dayhaha/Paddle,putcn/Paddle,jacquesqiao/Paddle,luotao1/Paddle,gangliao/Paddle,qingqing01/Paddle,gangliao/Paddle,hedaoyuan/Paddle,yu239/Paddle,putcn/Paddle,baidu/Paddle,lcy-seso/Paddle,hedaoyuan/Paddle,emailweixu/Paddle,tensor-tang/Paddle,zhouxiao-coder/Paddle,tensor-tang/Paddle,pkuyym/Paddle,putcn/Paddle,pkuyym/Paddle,QiJune/Paddle,lcy-seso/Paddle,gangliao/Paddle,helinwang/Paddle,gangliao/Paddle,wen-bo-yang/Paddle,pkuyym/Paddle,putcn/Paddle,chengduoZH/Paddle,baidu/Paddle,tensor-tang/Paddle,cxysteven/Paddle,beckett1124/Paddle,gangliao/Paddle,lispc/Paddle,jacquesqiao/Paddle,chengduoZH/Paddle,lcy-seso/Paddle,emailweixu/Paddle,lispc/Paddle,qingqing01/Paddle,pengli09/Paddle,alvations/Paddle,zhouxiao-coder/Paddle,hedaoyuan/Paddle,baidu/Paddle,helinwang/Paddle,yu239/Paddle,chengduoZH/Paddle,pengli09/Paddle,cxysteven/Paddle,pengli09/Paddle,beckett1124/Paddle,lispc/Paddle,lispc/Paddle,PaddlePaddle/Paddle,chengduoZH/Paddle,hedaoyuan/Paddle,pengli09/Paddle,beckett1124/Paddle,PaddlePaddle/Paddle,PaddlePaddle/Paddle,lcy-seso/Paddle,Canpio/Paddle,livc/Paddle,lcy-seso/Paddle,hedaoyuan/Paddle,PaddlePaddle/Paddle,cxysteven/Paddle,livc/Paddle,zhouxiao-coder/Paddle,zhouxiao-coder/Paddle,PaddlePaddle/Paddle,helinwang/Paddle,cxysteven/Paddle,jacquesqiao/Paddle,QiJune/Paddle,reyoung/Paddle,qingqing01/Paddle,cxysteven/Paddle,livc/Paddle,zhouxiao-coder/Paddle,hedaoyuan/Paddle,pengli09/Paddle,emailweixu/Paddle,Canpio/Paddle,yu239/Paddle,zhouxiao-coder/Paddle,hedaoyuan/Paddle,livc/Paddle,dayhaha/Paddle,lcy-seso/Paddle,PaddlePaddle/Paddle,wen-bo-yang/Paddle,QiJune/Paddle,livc/Paddle,jacquesqiao/Paddle,yu239/Paddle,reyoung/Paddle,chengduoZH/Paddle,yu239/Paddle,reyoung/Paddle,yu239/Paddle,yu239/Paddle,beckett1124/Paddle,hedaoyuan/Paddle,alvations/Paddle,wen-bo-yang/Paddle,qingqing01/Paddle,dayhaha/Paddle,QiJune/Paddle,livc/Paddle,zhouxiao-coder/Paddle,lispc/Paddle,QiJune/Paddle,putcn/Paddle,emailweixu/Paddle,livc/Paddle,Canpio/Paddle,baidu/Paddle,pengli09/Paddle,Canpio/Paddle,alvations/Paddle,helinwang/Paddle,Canpio/Paddle,beckett1124/Paddle,Canpio/Paddle,luotao1/Paddle,reyoung/Paddle,pkuyym/Paddle,beckett1124/Paddle,reyoung/Paddle,emailweixu/Paddle,dayhaha/Paddle,yu239/Paddle,emailweixu/Paddle