code: def get_scales(scale=None, n=None):
      
      if scale:
          is_reverse = False
          if scale[0] == '-':
              scale = scale[1:]
              is_reverse = True
          d = copy.deepcopy(_scales_names[scale.lower()])
          keys = list(map(int, list(d.keys())))
          cs = None
          if n:
              if n in keys:
                  cs = d[str(n)]
              elif n < min(keys):
                  cs = d[str(min(keys))]
          if cs is None:
              cs = d[str(max(keys))]
          if is_reverse:
              cs.reverse()
          return cs
      else:
          d = {}
          for k, v in list(_scales_names.items()):
              if isinstance(v, dict):
                  keys = list(map(int, list(v.keys())))
                  d[k] = v[str(max(keys))]
              else:
                  d[k] = v
          return d
docs: Returns a color scale 
  
      Parameters:
      -----------
              scale : str
                      Color scale name
                      If the color name is preceded by a minus (-) 
                      then the scale is inversed
              n : int
                      Number of colors 
                      If n < number of colors available for a given scale then 
                              the minimum number will be returned 
                      If n > number of colors available for a given scale then
                              the maximum number will be returned 
  
      Example:
              get_scales('accent',8)
              get_scales('pastel1')