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)

def display_instruct():
    message = """This is a master mind game """
    display_txt.delete(0.0, END)
    display_txt.insert(0.0, message)
 
 
def start():
      display_instruct()
      message="Hello"
      display_txt.delete(0.0, END)
      display_txt.insert(0.0, message)
 
 
def makeWindow():
      root = Tk()
      root.title("MasterMind game")
      root.geometry("500x500")
 
    #Start button
      b1=Button(root, text="start game",command=start)
      b1.grid(row = 1, column = 0, sticky = W)
 
 
    #reply button
      b1=Button(root, text="answer",command=start)
      b1.grid(row = 1, column = 2, sticky = W)
 
 
    #output window
      display_txt=Text(root,width = 50, height = 26, wrap = WORD)
      display_txt.grid(row = 0, column = 0, columnspan = 2, sticky = W)
 
     #Entry filed
      svar_ent = Entry()
      svar_ent.grid(row = 1, column = 1, sticky = W)
      return root
 
 
# main
makeWindow()
 
mainloop()

[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)

def display_instruct():
    message = """This is a master mind game """
    display_txt.delete(0.0, END)
    display_txt.insert(0.0, message)
 
 
def start():
      display_instruct()
      message="Hello"
      display_txt.delete(0.0, END)
      display_txt.insert(0.0, message)
 
 
def makeWindow():
      root = Tk()
      root.title("MasterMind game")
      root.geometry("500x500")
 
    #Start button
      b1=Button(root, text="start game",command=start)
      b1.grid(row = 1, column = 0, sticky = W)
 
 
    #reply button
      b1=Button(root, text="answer",command=start)
      b1.grid(row = 1, column = 2, sticky = W)
 
 
    #output window
      display_txt=Text(root,width = 50, height = 26, wrap = WORD)
      display_txt.grid(row = 0, column = 0, columnspan = 2, sticky = W)
 
     #Entry filed
      svar_ent = Entry()
      svar_ent.grid(row = 1, column = 1, sticky = W)
      return root
 
 
# main
makeWindow()
 
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:

class MyFrame(Frame):
    """A subclass of Tkinter.Frame."""
    def __init__(self, root, *args, **kwargs):
        Frame.__init__(self, root, *args, **kwargs)
        self.makeWindow(root)
 
 
      def makeWindow(self, root):
          #Start button
            b1=Button(root, text="start game",command=self.start)
            b1.grid(row = 1, column = 0, sticky = W)
 
 
          #reply button
            b1=Button(root, text="answer",command=start)
            b1.grid(row = 1, column = 2, sticky = W)
 
 
          #output window
            self.display_txt=Text(root,width = 50, height = 26, wrap = WORD)
            self.display_txt.grid(row = 0, column = 0, columnspan = 2, sticky = W)
 
           #Entry filed
            self.svar_ent = Entry()
            self.svar_ent.grid(row = 1, column = 1, sticky = W)
 
    def display_instruct(self):
        message = """This is a master mind game """
        self.display_txt.delete(0.0, END)
        self.display_txt.insert(0.0, message)
 
      def start(self):
            self.display_instruct()
            message="Hello"
            self.display_txt.delete(0.0, END)
            self.display_txt.insert(0.0, message)
 
if __name__ == "__main__":    # we do this so that the subclass can be used in other programs by importing it.
 
    root = Tk()
    root.title("MasterMind game")
    root.geometry("500x500")
    theFrame = MyFrame(root)
    theFrame.pack()
    mainloop()

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.