Merge pull request MorvanZhou#57 from JNingWei/master

Fix a bug "AttributeError"; Add three annotations.

Author: MorvanZhou

tkinterTUT/tk11_msgbox.py

@@ -4,15 +4,16 @@
 # Youku video tutorial: http://i.youku.com/pythontutorial
 
 import tkinter as tk
+import tkinter.messagebox
 
 window = tk.Tk()
 window.title('my window')
 window.geometry('200x200')
 
 def hit_me():
-    #tk.messagebox.showinfo(title='Hi', message='hahahaha')
-    #tk.messagebox.showwarning(title='Hi', message='nononono')
-    #tk.messagebox.showerror(title='Hi', message='No!! never')
+    #tk.messagebox.showinfo(title='Hi', message='hahahaha')   # return 'ok'
+    #tk.messagebox.showwarning(title='Hi', message='nononono')   # return 'ok'
+    #tk.messagebox.showerror(title='Hi', message='No!! never')   # return 'ok'
     #print(tk.messagebox.askquestion(title='Hi', message='hahahaha'))   # return 'yes' , 'no'
     #print(tk.messagebox.askyesno(title='Hi', message='hahahaha'))   # return True, False
     print(tk.messagebox.asktrycancel(title='Hi', message='hahahaha'))   # return True, False