code: def generate_numeric_range(items, lower_bound, upper_bound):
      
  
      quantile_grid = create_quantiles(items, lower_bound, upper_bound)
      labels, bounds = (zip(*quantile_grid))
      ranges = ((label, NumericRange(*bound))
                for label, bound in zip(labels, bounds))
      return ranges
docs: Generate postgresql numeric range and label for insertion.
  
      Parameters
      ----------
      items: iterable labels for ranges.
      lower_bound: numeric lower bound
      upper_bound: numeric upper bound