Add tkinter Notebook demo to main

Author: adipandas

src/main.py

@@ -3,7 +3,7 @@
 
 @author: Aditya
 
-This is the main file and will import other modules/codes written for python
+This is the main file and will import other modules/codes written for python tkinter demonstration
 '''
 
 import program1 as p1
@@ -17,6 +17,7 @@
 import program9 as p9
 import program10 as p10
 import program11 as p11
+import program12 as p12
 
 def main():
     p1.sayhello()
@@ -30,5 +31,7 @@ def main():
     p9.DisplayAppLaunch()
     p10.launchTopLevelApp()
     p11.launchPanedWindowApp()
+    p12.launchNoteBookApp()
 
-if __name__ == '__main__':main()
+if __name__ == '__main__':main()
+