code: def get_char_range(self, start, end, increment=None):
          
  
          increment = int(increment) if increment else 1
          if increment < 0:
              increment = -increment
  
          # Zero doesn't make sense as an incrementer
          # but like bash, just assume one
          if increment == 0:
              increment = 1
  
          inverse = start > end
          alpha = _nalpha if inverse else _alpha
  
          start = alpha.index(start)
          end = alpha.index(end)
  
          if start < end:
              return (c for c in alpha[start:end + 1:increment])
  
          else:
              return (c for c in alpha[end:start + 1:increment])
docs: Get a range of alphabetic characters.