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from Tkinter import * import string # This program shows how to make a typein box shadow a program variable. class App(Frame): def __init__(self, master=None): Frame.__init__(self, master) self.pack() self.entrythingy = Entry(self) self.entrythingy.pack() self.button = Button(self, text="Uppercase The Entry", command=self.upper) self.button.pack() # here we have the text in the entry widget tied to a variable. # changes in the variable are echoed in the widget and vice versa. # Very handy. # there are other Variable types. See Tkinter.py for all # the other variable types that can be shadowed self.contents = StringVar() self.contents.set("this is a variable") self.entrythingy.config(textvariable=self.contents) # and here we get a callback when the user hits return. we could # make the key that triggers the callback anything we wanted to. # other typical options might be or (for anything) self.entrythingy.bind('', self.print_contents) def upper(self): # notice here, we don't actually refer to the entry box. # we just operate on the string variable and we # because it's being looked at by the entry widget, changing # the variable changes the entry widget di