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So I wanted to write some code to provide a framework for math quizzes. Among other things, I wanted to be able to show LaTeX-like output on a canvas. But first, I just wanted to get the canvas showing simple text.

Part of the code:

def get_level_string(self):
        return self.f1.level_text.get()

    def set_level_string(self, text):
        print "here"
        self.f1.level_text.set(text + str(self.levels[self.level]))
        
    level_string = property(get_level_string, set_level_string)

...
# Left side user feedback frame
        self.f1 = Frame(master=self)
        self.f1.level_text = StringVar()
 (1) -->       self.f1.level_text.set("Level: " + str(self.levels[self.level]))
 (2) -->       print self.level_string
 (3) -->       self.level_string = "Level: "
        print self.level_string
        self.f1.level_label = Label(master=self.f1, textvariable=self.f1.level_text)
        self.f1.level_label.grid()

...

The output on the screen is as follows:

Level: 1
Level:

In other words, the code (1) operates differently from the code (3) even though (3) does (in principle) exactly the same thing.

Any thoughts?

Thanks,
Jeff

Sorry, I don't use Tkinter much, mostly wxPython. It looks to me that in (3) you are overwriting whatever has been in self.level_string with "Level: ".

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