code: def undo(self, text):
      text.mark_set("insert", self.index1)
      text.insert(self.index1, self.chars)
      self.set_marks(text, self.marks_before)
      text.see("insert")
  
imports: import string
  from idlelib.delegator import Delegator
label_desc: Use image node_id 4 for calling the DeleteCommand obj's underlying member method code with example usage: obj.undo(text) without return types