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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 update_thresh(self):
 """Emits a Qt signal thresholdUpdated with the current threshold value"""

        thresh_val = self.threshLine.value()
        self.threshold_field.setValue(thresh_val)
        self.thresholdUpdated.emit(thresh_val, self.getTitle())