Somebody help with Tkinter Frame subclass

idsh

I cant make this code work. I am new at Python, and in this program I have made a simple mastermind program.

After creating the widgets, I try to insert text in the textbox in a function but all I get is "NameError: global name 'display_txt' is not defined" for the textbox I have created earlier in the widgets

What am I missing???!!!!

Here is some code (part of it)

May 8 '07 #1

bartonc

I cant make this code work. I am new at Python, and in this program I have made a simple mastermind program.

After creating the widgets, I try to insert text in the textbox in a function but all I get is "NameError: global name 'display_txt' is not defined" for the textbox I have created earlier in the widgets

What am I missing???!!!!

Here is some code (part of it)

Expand|Select|Wrap|Line Numbers

1. def display_instruct():
2.     message = """This is a master mind game """
3.     display_txt.delete(0.0, END)
4.     display_txt.insert(0.0, message)
5.  
6.  
7. def start():
8.       display_instruct()
9.       message="Hello"
10.       display_txt.delete(0.0, END)
11.       display_txt.insert(0.0, message)
12.  
13.  
14. def makeWindow():
15.       root = Tk()
16.       root.title("MasterMind game")
17.       root.geometry("500x500")
18.  
19.     #Start button
20.       b1=Button(root, text="start game",command=start)
21.       b1.grid(row = 1, column = 0, sticky = W)
22.  
23.  
24.     #reply button
25.       b1=Button(root, text="answer",command=start)
26.       b1.grid(row = 1, column = 2, sticky = W)
27.  
28.  
29.     #output window
30.       display_txt=Text(root,width = 50, height = 26, wrap = WORD)
31.       display_txt.grid(row = 0, column = 0, columnspan = 2, sticky = W)
32.  
33.      #Entry filed
34.       svar_ent = Entry()
35.       svar_ent.grid(row = 1, column = 1, sticky = W)
36.       return root
37.  
38.  
39. # main
40. makeWindow()
41.  
42. mainloop()

What you want to do is make a subclass of frame so that Tk has something to show. All actions taking place in this frame belong in your subclass: I don't have my IDE on this machine, so I wont try to indent all your code for you, sorry. With a subclass, all variables that are shared (global, but in a limited scope) in the frame get named self.varableName (for example). All your functions take at least one argument named "self". There is a good example here.
Hope that helps.

May 8 '07 #2