code: def setPenColor(self, color_list):
      R, G, B, A = color_list
      self.pen.setColor(QColor(R, G, B, A))
  
imports: from qtpy import QtWidgets, QtCore
  from qtpy.QtCore import Qt, QPointF
  from qtpy.QtGui import QPen, QColor
label_desc: Use image node_id 2 for calling the AnnotationScene obj's underlying member method code with example usage: obj.setPenColor(color_list) without return types