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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 midPoint(self, point):
 """identify the midpoint between two mapPoints"""

        x = (self.x + point.x)/2.0
        y = (self.y + point.y)/2.0
        z = (self.z + point.z)/2.0
        return MapPoint(x,y,z)