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copied!<p>If the question is: "How do you update a Label widget?"<br> then the answer is with the widget's <code>configure</code> method.</p> <pre><code># Tkinter in Python 2.7 & tkinter in 3.2 import Tkinter as tk class GUI(tk.Tk): def __init__(self): tk.Tk.__init__(self) bF = tk.Frame(self, bd=8, relief='sunken') bF.pack(expand='true', fill='x') changeButton = tk.Button(bF, text='Change', bd=4, fg='white', relief='groove', activebackground='green', command=self.change_label) changeButton.pack() self.entryLabel = tk.Label(self, text='Hello') self.entryLabel.pack() self.mEntry = tk.Entry(self, bd=4, relief='sunken') self.mEntry.pack() def change_label(self): data = self.mEntry.get() self.entryLabel.configure(text=data) gui = GUI() gui.mainloop() </code></pre> <p>You will want to make your GUI a class like in this example;<br> that way you can use the self. prefix to refer to the widget made in another method.</p> <p>In your example it looks like you might be saying 'mt' is a <a href="http://infohost.nmt.edu/tcc/help/pubs/tkinter/control-variables.html" rel="nofollow">control variable</a>.<br> The answer would still be to make a class, so that you can use the self. prefix.</p> <p>The control variable likely isn't necessary unless you would want<br> the label to be updated as you changed the contents of the Entry widget:</p> <pre><code>import Tkinter as tk class GUI(tk.Tk): def __init__(self): tk.Tk.__init__(self) bF = tk.Frame(self, bd=8, relief='sunken') bF.pack(expand='true', fill='x') var = tk.StringVar() var.set('Hello') entryLabel = tk.Label(self, textvariable=var) entryLabel.pack() mEntry = tk.Entry(self, bd=4, relief='sunken', textvariable=var) mEntry.pack() gui = GUI() gui.mainloop() </code></pre>

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