code: def _updateColors(self, opts):
      # the logic here is to permit the user to update only data
      # without updating pens/brushes
  
      # update only if fresh pen/pens supplied
      if "pen" in opts or "pens" in opts:
          self._penWidth = [0, 0]
  
          if self.opts["pens"] is None:
              # pens not configured, use single pen
              pen = self.opts["pen"]
              pen = fn.mkPen(pen)
              self._updatePenWidth(pen)
              self._sharedPen = pen
              self._pens = None
          else:
              # pens configured, ignore single pen (if any)
              pens = []
              for pen in self.opts["pens"]:
                  if not isinstance(pen, QtGui.QPen):
                      pen = fn.mkPen(pen)
                  pens.append(pen)
              self._updatePenWidth(pen)
              self._sharedPen = None
              self._pens = pens
  
      # update only if fresh brush/brushes supplied
      if "brush" in opts or "brushes" in opts:
          if self.opts["brushes"] is None:
              # brushes not configured, use single brush
              brush = self.opts["brush"]
              self._sharedBrush = fn.mkBrush(brush)
              self._brushes = None
          else:
              # brushes configured, ignore single brush (if any)
              brushes = []
              for brush in self.opts["brushes"]:
                  if not isinstance(brush, QtGui.QBrush):
                      brush = fn.mkBrush(brush)
                  brushes.append(brush)
              self._sharedBrush = None
              self._brushes = brushes
  
      self._singleColor = (
          self._sharedPen is not None and self._sharedBrush is not None
      )
  
imports: import numpy
  from ..None import functions
  from ..None import getConfigOption
  from ..None import Qt
  from ..Qt import QtCore, QtGui
  from .GraphicsObject import GraphicsObject
label_desc: Use image node_id 4 for calling the BarGraphItem obj's underlying member method code with example usage: obj._updateColors(opts) without return types