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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 isFlexible(self):
 """ Returns true if any one of the channel, height, or width ranges of this shape allow more than one input value. """

        for key, value in self.arrayShapeRange.items():
            if key in _CONSTRAINED_KEYS:
                if value.isFlexible:
                    return True

        return False