code: def up_event(self, event):
      index = self.listbox.index("active")
      if self.listbox.selection_includes(index):
          index = index - 1
      else:
          index = self.listbox.size() - 1
      if index < 0:
          self.listbox.bell()
      else:
          self.select(index)
          self.on_select(index)
      return "break"
  
file_path: cpython/Lib/idlelib/scrolledlist.py
imports: from tkinter import *
  from tkinter.ttk import Frame, Scrollbar
  from idlelib import macosx
label_desc: Use image node_id 10 for calling the ScrolledList obj's underlying member method code with example usage: obj.up_event(event) and returns: str