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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 stop_button_click_handler(self):

 """Method to handle what to do when the stop button is pressed"""

        self.stop_button.setDisabled(True)
        # Interrupt computations or stop debugging
        if not self.shellwidget._reading:
            self.interrupt_kernel()
        else:
            self.shellwidget.write_to_stdin('exit')