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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def set_text(self, text="YEAH."):
 """ Sets the current value of the text box. """

        # Make sure the text is actually different, so as not to 
        # trigger a value changed signal
        s = str(text)
        if not s == self.get_text(): self._widget.setText(str(text))
        return self