Update for MXNet 1.0. PEP8 fixes to code and misc improvements. Tested under Python 2.7 and Python 3.6 on Sagemaker. (#9036)
Update for MXNet 1.0. PEP8 fixes to code and misc improvements. Tested under Python 2.7 and Python 3.6 on Sagemaker. (#9036)


ykim362/mxnet,ptrendx/mxnet,vikingMei/mxnet,zhreshold/mxnet,vikingMei/mxnet,jamesliu/mxnet,Northrend/mxnet,apache/incubator-mxnet,CodingCat/mxnet,TuSimple/mxnet,tlby/mxnet,indhub/mxnet,yuruofeifei/mxnet,leezu/mxnet,reminisce/mxnet,tornadomeet/mxnet,formath/mxnet,navrasio/mxnet,ykim362/mxnet,tornadomeet/mxnet,zhreshold/mxnet,DickJC123/mxnet,LinkHS/incubator-mxnet,jennyzhang0215/incubator-mxnet,luoyetx/mxnet,rahul003/mxnet,jiajiechen/mxnet,LinkHS/incubator-mxnet,ykim362/mxnet,eric-haibin-lin/mxnet,larroy/mxnet,tlby/mxnet,apache/incubator-mxnet,luoyetx/mxnet,TuSimple/mxnet,dmlc/mxnet,ForkedReposBak/mxnet,dmlc/mxnet,luoyetx/mxnet,LinkHS/incubator-mxnet,jamesliu/mxnet,leezu/mxnet,sxjscience/mxnet,yuruofeifei/mxnet,CodingCat/mxnet,zhreshold/mxnet,yajiedesign/mxnet,sxjscience/mxnet,szha/mxnet,tornadomeet/mxnet,rahul003/mxnet,dmlc/mxnet,dmlc/mxnet,tlby/mxnet,luoyetx/mxnet,leezu/mxnet,indhub/mxnet,fullfanta/mxnet,yuruofeifei/mxnet,tornadomeet/mxnet,TuSimple/mxnet,fullfanta/mxnet,tlby/mxnet,precedenceguo/mxnet,jennyzhang0215/incubator-mxnet,formath/mxnet,jamesliu/mxnet,jamesliu/mxnet,szha/mxnet,leezu/mxnet,zhreshold/mxnet,reminisce/mxnet,ykim362/mxnet,ptrendx/mxnet,CodingCat/mxnet,jamesliu/mxnet,navrasio/mxnet,sxjscience/mxnet,dmlc/mxnet,reminisce/mxnet,yajiedesign/mxnet,precedenceguo/mxnet,ForkedReposBak/mxnet,Northrend/mxnet,eric-haibin-lin/mxnet,mbaijal/incubator-mxnet,eric-haibin-lin/mxnet,dmlc/mxnet,formath/mxnet,navrasio/mxnet,dmlc/mxnet,formath/mxnet,tlby/mxnet,leezu/mxnet,reminisce/mxnet,szha/mxnet,precedenceguo/mxnet,ptrendx/mxnet,mbaijal/incubator-mxnet,Northrend/mxnet,jennyzhang0215/incubator-mxnet,Northrend/mxnet,luoyetx/mxnet,jamesliu/mxnet,zhreshold/mxnet,mbaijal/incubator-mxnet,yuruofeifei/mxnet,ForkedReposBak/mxnet,CodingCat/mxnet,reminisce/mxnet,larroy/mxnet,ykim362/mxnet,weleen/mxnet,fullfanta/mxnet,eric-haibin-lin/mxnet,Northrend/mxnet,formath/mxnet,indhub/mxnet,indhub/mxnet,vikingMei/mxnet,yuruofeifei/mxnet,fullfanta/mxnet,navrasio/mxnet,LinkHS/incubator-mxnet,zhreshold/mxnet,mbaijal/incubator-mxnet,yuruofeifei/mxnet,tlby/mxnet,larroy/mxnet,precedenceguo/mxnet,szha/mxnet,ptrendx/mxnet,formath/mxnet,eric-haibin-lin/mxnet,dmlc/mxnet,reminisce/mxnet,tlby/mxnet,zhreshold/mxnet,precedenceguo/mxnet,navrasio/mxnet,TuSimple/mxnet,jiajiechen/mxnet,TuSimple/mxnet,larroy/mxnet,vikingMei/mxnet,larroy/mxnet,weleen/mxnet,CodingCat/mxnet,rahul003/mxnet,larroy/mxnet,sxjscience/mxnet,ptrendx/mxnet,sxjscience/mxnet,fullfanta/mxnet,yuruofeifei/mxnet,weleen/mxnet,precedenceguo/mxnet,tornadomeet/mxnet,leezu/mxnet,ForkedReposBak/mxnet,tlby/mxnet,indhub/mxnet,eric-haibin-lin/mxnet,LinkHS/incubator-mxnet,CodingCat/mxnet,tlby/mxnet,Northrend/mxnet,szha/mxnet,sxjscience/mxnet,jiajiechen/mxnet,navrasio/mxnet,jiajiechen/mxnet,zhreshold/mxnet,fullfanta/mxnet,ForkedReposBak/mxnet,ptrendx/mxnet,rahul003/mxnet,mbaijal/incubator-mxnet,jennyzhang0215/incubator-mxnet,rahul003/mxnet,sxjscience/mxnet,Northrend/mxnet,apache/incubator-mxnet,vikingMei/mxnet,jennyzhang0215/incubator-mxnet,luoyetx/mxnet,leezu/mxnet,navrasio/mxnet,yajiedesign/mxnet,LinkHS/incubator-mxnet,fullfanta/mxnet,CodingCat/mxnet,jiajiechen/mxnet,yajiedesign/mxnet,precedenceguo/mxnet,rahul003/mxnet,fullfanta/mxnet,reminisce/mxnet,szha/mxnet,tornadomeet/mxnet,indhub/mxnet,navrasio/mxnet,fullfanta/mxnet,tornadomeet/mxnet,reminisce/mxnet,Northrend/mxnet,yajiedesign/mxnet,jennyzhang0215/incubator-mxnet,yuruofeifei/mxnet,jiajiechen/mxnet,TuSimple/mxnet,rahul003/mxnet,eric-haibin-lin/mxnet,rahul003/mxnet,yuruofeifei/mxnet,LinkHS/incubator-mxnet,eric-haibin-lin/mxnet,ptrendx/mxnet,luoyetx/mxnet,szha/mxnet,szha/mxnet,ptrendx/mxnet,ptrendx/mxnet,TuSimple/mxnet,precedenceguo/mxnet,rahul003/mxnet,indhub/mxnet,DickJC123/mxnet,vikingMei/mxnet,tornadomeet/mxnet,formath/mxnet,luoyetx/mxnet,apache/incubator-mxnet,jiajiechen/mxnet,ykim362/mxnet,CodingCat/mxnet,weleen/mxnet,jamesliu/mxnet,Northrend/mxnet,yajiedesign/mxnet,zhreshold/mxnet,TuSimple/mxnet,LinkHS/incubator-mxnet,eric-haibin-lin/mxnet,vikingMei/mxnet,ForkedReposBak/mxnet,formath/mxnet,CodingCat/mxnet,ykim362/mxnet,ykim362/mxnet,luoyetx/mxnet,larroy/mxnet,mbaijal/incubator-mxnet,formath/mxnet,precedenceguo/mxnet,vikingMei/mxnet,DickJC123/mxnet,mbaijal/incubator-mxnet,ptrendx/mxnet,vikingMei/mxnet,TuSimple/mxnet,weleen/mxnet,weleen/mxnet,sxjscience/mxnet,larroy/mxnet,jiajiechen/mxnet,LinkHS/incubator-mxnet,weleen/mxnet,jiajiechen/mxnet,weleen/mxnet,jennyzhang0215/incubator-mxnet,leezu/mxnet,DickJC123/mxnet,tlby/mxnet,ForkedReposBak/mxnet,jennyzhang0215/incubator-mxnet,reminisce/mxnet,jennyzhang0215/incubator-mxnet,ForkedReposBak/mxnet,mbaijal/incubator-mxnet,ykim362/mxnet,szha/mxnet,sxjscience/mxnet,jamesliu/mxnet,yajiedesign/mxnet,indhub/mxnet,yajiedesign/mxnet,tornadomeet/mxnet,TuSimple/mxnet,ForkedReposBak/mxnet,dmlc/mxnet,jamesliu/mxnet,weleen/mxnet,leezu/mxnet,larroy/mxnet,yajiedesign/mxnet,mbaijal/incubator-mxnet,navrasio/mxnet,reminisce/mxnet,indhub/mxnet