code: def make_random_histogram(length=100, num_bins=10):
      "Returns a sequence of histogram density values that sum to 1.0"
  
      hist, bin_edges = np.histogram(np.random.random(length),
                                     bins=num_bins, density=True)
  
      # to ensure they sum to 1.0
      hist = hist / sum(hist)
  
      if len(hist) < 2:
          raise ValueError('Invalid histogram')
  
      return hisf make_random_histogram(length=100, num_bins=10):
      "Returns a sequence of histogram density values that sum to 1.0"
  
      hist, bin_edges = np.histogram(np.random.random(length),
                                     bins=num_bins, density=True)
  
      # to ensure they sum to 1.0
      hist = hist / sum(hist)
  
      if len(hist) < 2:
          raise ValueError('Invalid histogram')
  
      return hist
docs: Returns a sequence of histogram density values that sum to 1.0