Fix computation of num_inputs for Python API create_operator_entry for custom operators with 0 arguments. (#7967)
Fix computation of num_inputs for Python API create_operator_entry for custom operators with 0 arguments. (#7967)


Northrend/mxnet,ForkedReposBak/mxnet,ZihengJiang/mxnet,kkk669/mxnet,fullfanta/mxnet,rahul003/mxnet,weleen/mxnet,tornadomeet/mxnet,formath/mxnet,ptrendx/mxnet,formath/mxnet,precedenceguo/mxnet,yajiedesign/mxnet,luoyetx/mxnet,navrasio/mxnet,szha/mxnet,CodingCat/mxnet,yuruofeifei/mxnet,hpi-xnor/BMXNet,yajiedesign/mxnet,ShownX/incubator-mxnet,Prasad9/incubator-mxnet,leezu/mxnet,wangyum/mxnet,reminisce/mxnet,jamesliu/mxnet,wangyum/mxnet,kkk669/mxnet,yuruofeifei/mxnet,crazy-cat/incubator-mxnet,ptrendx/mxnet,jermainewang/mxnet,sergeykolychev/mxnet,solin319/incubator-mxnet,ZihengJiang/mxnet,Mega-DatA-Lab/mxnet,madjam/mxnet,luoyetx/mxnet,Mega-DatA-Lab/mxnet,jennyzhang0215/incubator-mxnet,dmlc/mxnet,kkk669/mxnet,szha/mxnet,ykim362/mxnet,ZihengJiang/mxnet,yajiedesign/mxnet,crazy-cat/incubator-mxnet,tornadomeet/mxnet,szha/mxnet,antoan2/incubator-mxnet,ShownX/incubator-mxnet,fullfanta/mxnet,fullfanta/mxnet,antoan2/incubator-mxnet,LinkHS/incubator-mxnet,mbaijal/incubator-mxnet,piiswrong/mxnet,kkk669/mxnet,Northrend/mxnet,LinkHS/incubator-mxnet,jiajiechen/mxnet,tlby/mxnet,TuSimple/mxnet,kkk669/mxnet,luoyetx/mxnet,ForkedReposBak/mxnet,navrasio/mxnet,ShownX/incubator-mxnet,leezu/mxnet,Northrend/mxnet,CodingCat/mxnet,yuruofeifei/mxnet,fullfanta/mxnet,yuruofeifei/mxnet,weleen/mxnet,TuSimple/mxnet,solin319/incubator-mxnet,rahul003/mxnet,luoyetx/mxnet,Prasad9/incubator-mxnet,navrasio/mxnet,hpi-xnor/BMXNet,ForkedReposBak/mxnet,jiajiechen/mxnet,apache/incubator-mxnet,zhreshold/mxnet,ShownX/incubator-mxnet,jamesliu/mxnet,weleen/mxnet,TuSimple/mxnet,yuruofeifei/mxnet,zhreshold/mxnet,ForkedReposBak/mxnet,weleen/mxnet,ykim362/mxnet,solin319/incubator-mxnet,wangyum/mxnet,zhreshold/mxnet,kkk669/mxnet,Northrend/mxnet,antoan2/incubator-mxnet,eric-haibin-lin/mxnet,Prasad9/incubator-mxnet,ZihengJiang/mxnet,weleen/mxnet,ShownX/incubator-mxnet,larroy/mxnet,LinkHS/incubator-mxnet,dmlc/mxnet,navrasio/mxnet,vikingMei/mxnet,crazy-cat/incubator-mxnet,rahul003/mxnet,navrasio/mxnet,weleen/mxnet,indhub/mxnet,vikingMei/mxnet,madjam/mxnet,antoan2/incubator-mxnet,tornadomeet/mxnet,ForkedReposBak/mxnet,crazy-cat/incubator-mxnet,jermainewang/mxnet,solin319/incubator-mxnet,weleen/mxnet,hpi-xnor/BMXNet,CodingCat/mxnet,piiswrong/mxnet,dmlc/mxnet,szha/mxnet,TuSimple/mxnet,sxjscience/mxnet,navrasio/mxnet,vikingMei/mxnet,CodingCat/mxnet,vikingMei/mxnet,sxjscience/mxnet,hpi-xnor/BMXNet,tlby/mxnet,sergeykolychev/mxnet,vikingMei/mxnet,ZihengJiang/mxnet,wangyum/mxnet,Mega-DatA-Lab/mxnet,jiajiechen/mxnet,crazy-cat/incubator-mxnet,mbaijal/incubator-mxnet,sergeykolychev/mxnet,jamesliu/mxnet,yajiedesign/mxnet,tlby/mxnet,tornadomeet/mxnet,reminisce/mxnet,dmlc/mxnet,wangyum/mxnet,ZihengJiang/mxnet,leezu/mxnet,solin319/incubator-mxnet,hpi-xnor/BMXNet,tornadomeet/mxnet,antoan2/incubator-mxnet,yuruofeifei/mxnet,wangyum/mxnet,piiswrong/mxnet,Northrend/mxnet,ykim362/mxnet,TuSimple/mxnet,reminisce/mxnet,precedenceguo/mxnet,crazy-cat/incubator-mxnet,LinkHS/incubator-mxnet,Mega-DatA-Lab/mxnet,szha/mxnet,jermainewang/mxnet,crazy-cat/incubator-mxnet,indhub/mxnet,crazy-cat/incubator-mxnet,sergeykolychev/mxnet,formath/mxnet,zhreshold/mxnet,zhreshold/mxnet,apache/incubator-mxnet,tlby/mxnet,crazy-cat/incubator-mxnet,antoan2/incubator-mxnet,dmlc/mxnet,eric-haibin-lin/mxnet,hpi-xnor/BMXNet,piiswrong/mxnet,ykim362/mxnet,fullfanta/mxnet,navrasio/mxnet,piiswrong/mxnet,larroy/mxnet,weleen/mxnet,sxjscience/mxnet,sxjscience/mxnet,leezu/mxnet,navrasio/mxnet,LinkHS/incubator-mxnet,rahul003/mxnet,dmlc/mxnet,larroy/mxnet,ShownX/incubator-mxnet,jamesliu/mxnet,precedenceguo/mxnet,precedenceguo/mxnet,madjam/mxnet,tlby/mxnet,szha/mxnet,reminisce/mxnet,jermainewang/mxnet,piiswrong/mxnet,wangyum/mxnet,CodingCat/mxnet,madjam/mxnet,ykim362/mxnet,eric-haibin-lin/mxnet,weleen/mxnet,navrasio/mxnet,leezu/mxnet,ptrendx/mxnet,madjam/mxnet,LinkHS/incubator-mxnet,sxjscience/mxnet,CodingCat/mxnet,jiajiechen/mxnet,DickJC123/mxnet,indhub/mxnet,vikingMei/mxnet,solin319/incubator-mxnet,tlby/mxnet,CodingCat/mxnet,Northrend/mxnet,piiswrong/mxnet,formath/mxnet,jiajiechen/mxnet,yajiedesign/mxnet,vikingMei/mxnet,madjam/mxnet,sxjscience/mxnet,eric-haibin-lin/mxnet,luoyetx/mxnet,fullfanta/mxnet,TuSimple/mxnet,formath/mxnet,dmlc/mxnet,sxjscience/mxnet,DickJC123/mxnet,dmlc/mxnet,indhub/mxnet,leezu/mxnet,ykim362/mxnet,leezu/mxnet,TuSimple/mxnet,ShownX/incubator-mxnet,zhreshold/mxnet,tlby/mxnet,ZihengJiang/mxnet,jiajiechen/mxnet,piiswrong/mxnet,ForkedReposBak/mxnet,madjam/mxnet,jennyzhang0215/incubator-mxnet,jamesliu/mxnet,ShownX/incubator-mxnet,eric-haibin-lin/mxnet,rahul003/mxnet,vikingMei/mxnet,fullfanta/mxnet,DickJC123/mxnet,szha/mxnet,sergeykolychev/mxnet,formath/mxnet,Prasad9/incubator-mxnet,mbaijal/incubator-mxnet,jamesliu/mxnet,Prasad9/incubator-mxnet,dmlc/mxnet,mbaijal/incubator-mxnet,apache/incubator-mxnet,solin319/incubator-mxnet,Mega-DatA-Lab/mxnet,mbaijal/incubator-mxnet,yajiedesign/mxnet,kkk669/mxnet,reminisce/mxnet,hpi-xnor/BMXNet,ZihengJiang/mxnet,larroy/mxnet,larroy/mxnet,fullfanta/mxnet,ykim362/mxnet,jennyzhang0215/incubator-mxnet,leezu/mxnet,madjam/mxnet,Prasad9/incubator-mxnet,ptrendx/mxnet,rahul003/mxnet,LinkHS/incubator-mxnet,Mega-DatA-Lab/mxnet,DickJC123/mxnet,jiajiechen/mxnet,yajiedesign/mxnet,luoyetx/mxnet,formath/mxnet,yuruofeifei/mxnet,leezu/mxnet,eric-haibin-lin/mxnet,Prasad9/incubator-mxnet,tornadomeet/mxnet,Mega-DatA-Lab/mxnet,TuSimple/mxnet,sergeykolychev/mxnet,rahul003/mxnet,Prasad9/incubator-mxnet,antoan2/incubator-mxnet,tlby/mxnet,zhreshold/mxnet,solin319/incubator-mxnet,hpi-xnor/BMXNet,TuSimple/mxnet,ptrendx/mxnet,ptrendx/mxnet,jennyzhang0215/incubator-mxnet,zhreshold/mxnet,tornadomeet/mxnet,eric-haibin-lin/mxnet,sergeykolychev/mxnet,precedenceguo/mxnet,larroy/mxnet,eric-haibin-lin/mxnet,szha/mxnet,jennyzhang0215/incubator-mxnet,jermainewang/mxnet,reminisce/mxnet,mbaijal/incubator-mxnet,larroy/mxnet,jiajiechen/mxnet,ykim362/mxnet,reminisce/mxnet,kkk669/mxnet,CodingCat/mxnet,Mega-DatA-Lab/mxnet,jermainewang/mxnet,jermainewang/mxnet,ForkedReposBak/mxnet,vikingMei/mxnet,fullfanta/mxnet,ForkedReposBak/mxnet,ZihengJiang/mxnet,antoan2/incubator-mxnet,jennyzhang0215/incubator-mxnet,jennyzhang0215/incubator-mxnet,precedenceguo/mxnet,tornadomeet/mxnet,indhub/mxnet,hpi-xnor/BMXNet,mbaijal/incubator-mxnet,tornadomeet/mxnet,piiswrong/mxnet,zhreshold/mxnet,Northrend/mxnet,precedenceguo/mxnet,szha/mxnet,luoyetx/mxnet,jamesliu/mxnet,indhub/mxnet,tlby/mxnet,formath/mxnet,luoyetx/mxnet,jamesliu/mxnet,jermainewang/mxnet,tlby/mxnet,reminisce/mxnet,luoyetx/mxnet,ptrendx/mxnet,solin319/incubator-mxnet,indhub/mxnet,yajiedesign/mxnet,sergeykolychev/mxnet,reminisce/mxnet,apache/incubator-mxnet,TuSimple/mxnet,indhub/mxnet,yuruofeifei/mxnet,wangyum/mxnet,formath/mxnet,CodingCat/mxnet,LinkHS/incubator-mxnet,sxjscience/mxnet,Northrend/mxnet,indhub/mxnet,jennyzhang0215/incubator-mxnet,sxjscience/mxnet,rahul003/mxnet,jiajiechen/mxnet,sergeykolychev/mxnet,madjam/mxnet,kkk669/mxnet,ForkedReposBak/mxnet,ShownX/incubator-mxnet,reminisce/mxnet,yuruofeifei/mxnet,Northrend/mxnet,larroy/mxnet,Prasad9/incubator-mxnet,wangyum/mxnet,antoan2/incubator-mxnet,LinkHS/incubator-mxnet,jamesliu/mxnet,ptrendx/mxnet,yajiedesign/mxnet,Mega-DatA-Lab/mxnet,mbaijal/incubator-mxnet,larroy/mxnet,jermainewang/mxnet,ykim362/mxnet,mbaijal/incubator-mxnet,rahul003/mxnet,precedenceguo/mxnet,eric-haibin-lin/mxnet,ptrendx/mxnet,precedenceguo/mxnet,ptrendx/mxnet,jennyzhang0215/incubator-mxnet