Update pnv.js

pnv.js

@@ -38,9 +38,9 @@ function getPySrc(src,args){
 return new Promise(function(resolve, reject) {	
   
 let options = {
-  mode: 'text',
+  mode: 'binary',
   pythonPath: '/usr/bin/python',
-  pythonOptions: ['-u'], // get print results in real-time
+  //pythonOptions: ['-u'], // get print results in real-time
   scriptPath: '/root/',
   args: args
 };