Add -e option to run command. (#1465)
Add -e option to run command. (#1465)


craigcitro/datalab,craigcitro/datalab,yebrahim/datalab,googledatalab/datalab,parthea/datalab,googledatalab/datalab,craigcitro/datalab,yebrahim/datalab,googledatalab/datalab,yebrahim/datalab,parthea/datalab,craigcitro/datalab,yebrahim/datalab,googledatalab/datalab,parthea/datalab,craigcitro/datalab,parthea/datalab,parthea/datalab,yebrahim/datalab,googledatalab/datalab,parthea/datalab,googledatalab/datalab