content: import traceback
  
  from qtpy.QtWidgets import QGraphicsPixmapItem
  from qtpy.QtGui import QPixmap, QImage
  
  from ...GUIBase import GUIBase
  from ...utils import get_resource
  
  
  class NodeErrorIndicator(GUIBase, QGraphicsPixmapItem):
  
      def __init__(self, node_item):
          GUIBase.__init__(self)
          QGraphicsPixmapItem.__init__(self, parent=node_item)
  
          self.node = node_item
          self.pix = QPixmap(str(get_resource('pics/warning.png')))
          self.setPixmap(self.pix)
          self.setScale(0.1)
          self.setOffset(-self.boundingRect().width()/2, -self.boundingRect().width()/2)
  
      def set_error(self, e):
          error_msg = ''.join([
              f'<p>{line}</p>'
              for line in traceback.format_exc().splitlines()
          ])
  
          self.setToolTip(
              f'<html><head/><body>'
              f'{error_msg}'
              f'</body></html>'
          )
  