check that target_column is six.string_types
check that target_column is six.string_types

annarev/tensorflow,aldian/tensorflow,jhseu/tensorflow,aam-at/tensorflow,chemelnucfin/tensorflow,alsrgv/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,asimshankar/tensorflow,dancingdan/tensorflow,gautam1858/tensorflow,brchiu/tensorflow,xzturn/tensorflow,renyi533/tensorflow,jart/tensorflow,Bismarrck/tensorflow,girving/tensorflow,dongjoon-hyun/tensorflow,Intel-Corporation/tensorflow,aselle/tensorflow,sarvex/tensorflow,jart/tensorflow,aselle/tensorflow,ZhangXinNan/tensorflow,cxxgtxy/tensorflow,tensorflow/tensorflow,jendap/tensorflow,aselle/tensorflow,adit-chandra/tensorflow,Bismarrck/tensorflow,karllessard/tensorflow,jbedorf/tensorflow,xzturn/tensorflow,gunan/tensorflow,arborh/tensorflow,hehongliang/tensorflow,karllessard/tensorflow,aselle/tensorflow,caisq/tensorflow,renyi533/tensorflow,manipopopo/tensorflow,ppwwyyxx/tensorflow,jart/tensorflow,annarev/tensorflow,alshedivat/tensorflow,Intel-Corporation/tensorflow,ZhangXinNan/tensorflow,petewarden/tensorflow,alshedivat/tensorflow,jbedorf/tensorflow,petewarden/tensorflow,jbedorf/tensorflow,snnn/tensorflow,adit-chandra/tensorflow,jhseu/tensorflow,dancingdan/tensorflow,Intel-tensorflow/tensorflow,Bismarrck/tensorflow,snnn/tensorflow,DavidNorman/tensorflow,jendap/tensorflow,ppwwyyxx/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,aam-at/tensorflow,hfp/tensorflow-xsmm,arborh/tensorflow,manipopopo/tensorflow,xodus7/tensorflow,seanli9jan/tensorflow,jalexvig/tensorflow,renyi533/tensorflow,AnishShah/tensorflow,davidzchen/tensorflow,chemelnucfin/tensorflow,jbedorf/tensorflow,alshedivat/tensorflow,freedomtan/tensorflow,DavidNorman/tensorflow,ZhangXinNan/tensorflow,dongjoon-hyun/tensorflow,tensorflow/tensorflow,ZhangXinNan/tensorflow,petewarden/tensorflow,dongjoon-hyun/tensorflow,adit-chandra/tensorflow,chemelnucfin/tensorflow,ZhangXinNan/tensorflow,gunan/tensorflow,seanli9jan/tensorflow,hfp/tensorflow-xsmm,dancingdan/tensorflow,annarev/tensorflow,frreiss/tensorflow-fred,freedomtan/tensorflow,annarev/tensorflow,jhseu/tensorflow,ageron/tensorflow,tensorflow/tensorflow-pywrap_saved_model,tensorflow/tensorflow-pywrap_tf_optimizer,chemelnucfin/tensorflow,drpngx/tensorflow,girving/tensorflow,manipopopo/tensorflow,Bismarrck/tensorflow,yongtang/tensorflow,davidzchen/tensorflow,snnn/tensorflow,ageron/tensorflow,apark263/tensorflow,xzturn/tensorflow,xzturn/tensorflow,Bismarrck/tensorflow,frreiss/tensorflow-fred,frreiss/tensorflow-fred,alsrgv/tensorflow,jbedorf/tensorflow,yongtang/tensorflow,girving/tensorflow,manipopopo/tensorflow,paolodedios/tensorflow,jalexvig/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,jhseu/tensorflow,drpngx/tensorflow,brchiu/tensorflow,seanli9jan/tensorflow,xzturn/tensorflow,jart/tensorflow,Intel-tensorflow/tensorflow,xodus7/tensorflow,drpngx/tensorflow,kobejean/tensorflow,adit-chandra/tensorflow,xodus7/tensorflow,gunan/tensorflow,chemelnucfin/tensorflow,kevin-coder/tensorflow-fork,jendap/tensorflow,jalexvig/tensorflow,arborh/tensorflow,dongjoon-hyun/tensorflow,paolodedios/tensorflow,asimshankar/tensorflow,yongtang/tensorflow,ghchinoy/tensorflow,DavidNorman/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,jbedorf/tensorflow,kevin-coder/tensorflow-fork,jalexvig/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,seanli9jan/tensorflow,alsrgv/tensorflow,Intel-tensorflow/tensorflow,hfp/tensorflow-xsmm,xodus7/tensorflow,alshedivat/tensorflow,petewarden/tensorflow,frreiss/tensorflow-fred,adit-chandra/tensorflow,DavidNorman/tensorflow,ghchinoy/tensorflow,gautam1858/tensorflow,snnn/tensorflow,girving/tensorflow,ppwwyyxx/tensorflow,AnishShah/tensorflow,tensorflow/tensorflow,jalexvig/tensorflow,tensorflow/tensorflow,theflofly/tensorflow,jbedorf/tensorflow,karllessard/tensorflow,tensorflow/tensorflow-pywrap_saved_model,jart/tensorflow,kevin-coder/tensorflow-fork,aldian/tensorflow,asimshankar/tensorflow,kobejean/tensorflow,hehongliang/tensorflow,xodus7/tensorflow,Intel-Corporation/tensorflow,ageron/tensorflow,davidzchen/tensorflow,ageron/tensorflow,karllessard/tensorflow,caisq/tensorflow,aselle/tensorflow,Bismarrck/tensorflow,Bismarrck/tensorflow,paolodedios/tensorflow,sarvex/tensorflow,cxxgtxy/tensorflow,ppwwyyxx/tensorflow,freedomtan/tensorflow,Bismarrck/tensorflow,jendap/tensorflow,yongtang/tensorflow,xodus7/tensorflow,annarev/tensorflow,aam-at/tensorflow,seanli9jan/tensorflow,frreiss/tensorflow-fred,ageron/tensorflow,yongtang/tensorflow,gautam1858/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,chemelnucfin/tensorflow,gautam1858/tensorflow,girving/tensorflow,hehongliang/tensorflow,aam-at/tensorflow,paolodedios/tensorflow,gautam1858/tensorflow,tensorflow/tensorflow-pywrap_saved_model,adit-chandra/tensorflow,arborh/tensorflow,tensorflow/tensorflow,jhseu/tensorflow,asimshankar/tensorflow,ppwwyyxx/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,davidzchen/tensorflow,dongjoon-hyun/tensorflow,davidzchen/tensorflow,caisq/tensorflow,xzturn/tensorflow,alsrgv/tensorflow,hehongliang/tensorflow,hfp/tensorflow-xsmm,paolodedios/tensorflow,AnishShah/tensorflow,hfp/tensorflow-xsmm,frreiss/tensorflow-fred,snnn/tensorflow,caisq/tensorflow,renyi533/tensorflow,drpngx/tensorflow,ghchinoy/tensorflow,renyi533/tensorflow,sarvex/tensorflow,AnishShah/tensorflow,alshedivat/tensorflow,ghchinoy/tensorflow,frreiss/tensorflow-fred,tensorflow/tensorflow,tensorflow/tensorflow-pywrap_saved_model,aam-at/tensorflow,cxxgtxy/tensorflow,ZhangXinNan/tensorflow,asimshankar/tensorflow,arborh/tensorflow,dongjoon-hyun/tensorflow,DavidNorman/tensorflow,Intel-tensorflow/tensorflow,jalexvig/tensorflow,jart/tensorflow,davidzchen/tensorflow,drpngx/tensorflow,gunan/tensorflow,davidzchen/tensorflow,drpngx/tensorflow,Intel-tensorflow/tensorflow,aldian/tensorflow,arborh/tensorflow,aam-at/tensorflow,hfp/tensorflow-xsmm,gautam1858/tensorflow,DavidNorman/tensorflow,karllessard/tensorflow,ppwwyyxx/tensorflow,kobejean/tensorflow,AnishShah/tensorflow,Intel-tensorflow/tensorflow,jhseu/tensorflow,AnishShah/tensorflow,aldian/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,frreiss/tensorflow-fred,alshedivat/tensorflow,sarvex/tensorflow,aldian/tensorflow,kevin-coder/tensorflow-fork,kobejean/tensorflow,aam-at/tensorflow,tensorflow/tensorflow-pywrap_saved_model,Bismarrck/tensorflow,frreiss/tensorflow-fred,aselle/tensorflow,chemelnucfin/tensorflow,davidzchen/tensorflow,gunan/tensorflow,jendap/tensorflow,dongjoon-hyun/tensorflow,gunan/tensorflow,Intel-Corporation/tensorflow,xzturn/tensorflow,cxxgtxy/tensorflow,dancingdan/tensorflow,xzturn/tensorflow,kevin-coder/tensorflow-fork,aam-at/tensorflow,karllessard/tensorflow,chemelnucfin/tensorflow,frreiss/tensorflow-fred,manipopopo/tensorflow,alshedivat/tensorflow,asimshankar/tensorflow,apark263/tensorflow,ageron/tensorflow,sarvex/tensorflow,manipopopo/tensorflow,ageron/tensorflow,theflofly/tensorflow,annarev/tensorflow,tensorflow/tensorflow-pywrap_saved_model,jbedorf/tensorflow,gautam1858/tensorflow,paolodedios/tensorflow,aam-at/tensorflow,karllessard/tensorflow,gautam1858/tensorflow,hfp/tensorflow-xsmm,karllessard/tensorflow,brchiu/tensorflow,ZhangXinNan/tensorflow,jart/tensorflow,jhseu/tensorflow,renyi533/tensorflow,gautam1858/tensorflow,freedomtan/tensorflow,jhseu/tensorflow,dancingdan/tensorflow,alsrgv/tensorflow,tensorflow/tensorflow,kevin-coder/tensorflow-fork,DavidNorman/tensorflow,jhseu/tensorflow,paolodedios/tensorflow,ghchinoy/tensorflow,petewarden/tensorflow,alsrgv/tensorflow,AnishShah/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,ageron/tensorflow,DavidNorman/tensorflow,jhseu/tensorflow,alsrgv/tensorflow,apark263/tensorflow,annarev/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,caisq/tensorflow,brchiu/tensorflow,jendap/tensorflow,gunan/tensorflow,xodus7/tensorflow,theflofly/tensorflow,alsrgv/tensorflow,brchiu/tensorflow,xodus7/tensorflow,manipopopo/tensorflow,apark263/tensorflow,yongtang/tensorflow,ghchinoy/tensorflow,apark263/tensorflow,DavidNorman/tensorflow,freedomtan/tensorflow,annarev/tensorflow,jendap/tensorflow,theflofly/tensorflow,aldian/tensorflow,Intel-Corporation/tensorflow,apark263/tensorflow,ZhangXinNan/tensorflow,dancingdan/tensorflow,DavidNorman/tensorflow,Intel-tensorflow/tensorflow,snnn/tensorflow,renyi533/tensorflow,ageron/tensorflow,DavidNorman/tensorflow,karllessard/tensorflow,ghchinoy/tensorflow,jbedorf/tensorflow,yongtang/tensorflow,jart/tensorflow,davidzchen/tensorflow,drpngx/tensorflow,jbedorf/tensorflow,gunan/tensorflow,ageron/tensorflow,aldian/tensorflow,adit-chandra/tensorflow,manipopopo/tensorflow,theflofly/tensorflow,gautam1858/tensorflow,hfp/tensorflow-xsmm,caisq/tensorflow,aselle/tensorflow,paolodedios/tensorflow,sarvex/tensorflow,adit-chandra/tensorflow,arborh/tensorflow,sarvex/tensorflow,gunan/tensorflow,dancingdan/tensorflow,arborh/tensorflow,ppwwyyxx/tensorflow,ppwwyyxx/tensorflow,brchiu/tensorflow,petewarden/tensorflow,girving/tensorflow,ZhangXinNan/tensorflow,xzturn/tensorflow,apark263/tensorflow,aam-at/tensorflow,ghchinoy/tensorflow,tensorflow/tensorflow,paolodedios/tensorflow,kobejean/tensorflow,kobejean/tensorflow,girving/tensorflow,davidzchen/tensorflow,jart/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,apark263/tensorflow,ghchinoy/tensorflow,jalexvig/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,alsrgv/tensorflow,renyi533/tensorflow,jhseu/tensorflow,tensorflow/tensorflow-pywrap_saved_model,seanli9jan/tensorflow,freedomtan/tensorflow,chemelnucfin/tensorflow,alshedivat/tensorflow,xodus7/tensorflow,theflofly/tensorflow,freedomtan/tensorflow,kobejean/tensorflow,yongtang/tensorflow,dongjoon-hyun/tensorflow,drpngx/tensorflow,Intel-Corporation/tensorflow,dancingdan/tensorflow,jalexvig/tensorflow,ghchinoy/tensorflow,annarev/tensorflow,kevin-coder/tensorflow-fork,renyi533/tensorflow,hfp/tensorflow-xsmm,Bismarrck/tensorflow,freedomtan/tensorflow,adit-chandra/tensorflow,brchiu/tensorflow,Intel-tensorflow/tensorflow,asimshankar/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,aldian/tensorflow,yongtang/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,Intel-tensorflow/tensorflow,ppwwyyxx/tensorflow,gautam1858/tensorflow,renyi533/tensorflow,asimshankar/tensorflow,brchiu/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,tensorflow/tensorflow,manipopopo/tensorflow,snnn/tensorflow,aam-at/tensorflow,snnn/tensorflow,tensorflow/tensorflow-pywrap_saved_model,alsrgv/tensorflow,theflofly/tensorflow,cxxgtxy/tensorflow,jbedorf/tensorflow,caisq/tensorflow,apark263/tensorflow,drpngx/tensorflow,brchiu/tensorflow,seanli9jan/tensorflow,caisq/tensorflow,snnn/tensorflow,jalexvig/tensorflow,apark263/tensorflow,ZhangXinNan/tensorflow,kobejean/tensorflow,xodus7/tensorflow,arborh/tensorflow,aselle/tensorflow,Intel-Corporation/tensorflow,girving/tensorflow,snnn/tensorflow,xodus7/tensorflow,snnn/tensorflow,davidzchen/tensorflow,alshedivat/tensorflow,jart/tensorflow,ageron/tensorflow,asimshankar/tensorflow,AnishShah/tensorflow,freedomtan/tensorflow,alsrgv/tensorflow,annarev/tensorflow,caisq/tensorflow,hehongliang/tensorflow,petewarden/tensorflow,alshedivat/tensorflow,freedomtan/tensorflow,arborh/tensorflow,gunan/tensorflow,drpngx/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,tensorflow/tensorflow-pywrap_tf_optimizer,dancingdan/tensorflow,theflofly/tensorflow,kobejean/tensorflow,petewarden/tensorflow,paolodedios/tensorflow,AnishShah/tensorflow,gunan/tensorflow,jendap/tensorflow,adit-chandra/tensorflow,davidzchen/tensorflow,jendap/tensorflow,AnishShah/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,girving/tensorflow,theflofly/tensorflow,chemelnucfin/tensorflow,dongjoon-hyun/tensorflow,freedomtan/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,adit-chandra/tensorflow,seanli9jan/tensorflow,ZhangXinNan/tensorflow,petewarden/tensorflow,adit-chandra/tensorflow,Bismarrck/tensorflow,jhseu/tensorflow,theflofly/tensorflow,dongjoon-hyun/tensorflow,aselle/tensorflow,ghchinoy/tensorflow,dancingdan/tensorflow,aselle/tensorflow,hfp/tensorflow-xsmm,paolodedios/tensorflow,tensorflow/tensorflow-pywrap_saved_model,dancingdan/tensorflow,kevin-coder/tensorflow-fork,ppwwyyxx/tensorflow,ageron/tensorflow,renyi533/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,seanli9jan/tensorflow,chemelnucfin/tensorflow,petewarden/tensorflow,girving/tensorflow,arborh/tensorflow,tensorflow/tensorflow,kevin-coder/tensorflow-fork,xzturn/tensorflow,tensorflow/tensorflow-pywrap_saved_model,theflofly/tensorflow,aselle/tensorflow,caisq/tensorflow,arborh/tensorflow,cxxgtxy/tensorflow,ppwwyyxx/tensorflow,hehongliang/tensorflow,xzturn/tensorflow,sarvex/tensorflow,Intel-tensorflow/tensorflow,petewarden/tensorflow,jendap/tensorflow,hehongliang/tensorflow,brchiu/tensorflow,jalexvig/tensorflow,xzturn/tensorflow,cxxgtxy/tensorflow,gunan/tensorflow,girving/tensorflow,petewarden/tensorflow,jbedorf/tensorflow,frreiss/tensorflow-fred,tensorflow/tensorflow-pywrap_saved_model,chemelnucfin/tensorflow,brchiu/tensorflow,asimshankar/tensorflow,gautam1858/tensorflow,alshedivat/tensorflow,ghchinoy/tensorflow,manipopopo/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,annarev/tensorflow,seanli9jan/tensorflow,alsrgv/tensorflow,kevin-coder/tensorflow-fork,tensorflow/tensorflow,kobejean/tensorflow,seanli9jan/tensorflow,Intel-Corporation/tensorflow,jendap/tensorflow,yongtang/tensorflow,renyi533/tensorflow,freedomtan/tensorflow,dongjoon-hyun/tensorflow,DavidNorman/tensorflow,jalexvig/tensorflow,karllessard/tensorflow,ppwwyyxx/tensorflow,yongtang/tensorflow,karllessard/tensorflow,kevin-coder/tensorflow-fork,cxxgtxy/tensorflow,Intel-tensorflow/tensorflow,theflofly/tensorflow,asimshankar/tensorflow,aam-at/tensorflow,manipopopo/tensorflow,kobejean/tensorflow,apark263/tensorflow,frreiss/tensorflow-fred,hfp/tensorflow-xsmm,AnishShah/tensorflow