text: import math
  from vector import Vector
  class NormedVector(Vector):
      def __init__(self,array):
          super().__init__(array)
  
      def inner_product(self,another):
          result = 0.0
          for idx in range(len(self._array)):
              result += self._array[idx] * another._array[idx]
          return result
  
      def norm(self):
          return math.sqrt(self.inner_product(self))
  