text: import numpy as np
  from .ideal_low_pass import IdealLowPass
  
  class IdealHighPass(IdealLowPass):
      def __init__(self, shape, cutoff):
          super().__init__(shape, cutoff)
  
      def build_filter(self):
          super().build_filter()
          self.mask = 1 - super().get_filter()
  