code: def _init_exampleListbox(self, parent):
      self._exampleFrame = listframe = Frame(parent)
      self._exampleFrame.pack(fill="both", side="left", padx=2)
      self._exampleList_label = Label(
          self._exampleFrame, font=self._boldfont, text="Examples"
      )
      self._exampleList_label.pack()
      self._exampleList = Listbox(
          self._exampleFrame,
          selectmode="single",
          relief="groove",
          background="white",
          foreground="#909090",
          font=self._font,
          selectforeground="#004040",
          selectbackground="#c0f0c0",
      )
  
      self._exampleList.pack(side="right", fill="both", expand=1)
  
      for example in self._examples:
          self._exampleList.insert("end", ("  %s" % example))
      self._exampleList.config(
          height=min(len(self._examples), 25), width=40
      )
  
      # Add a scrollbar if there are more than 25 examples.
      if len(self._examples) > 25:
          listscroll = Scrollbar(self._exampleFrame, orient="vertical")
          self._exampleList.config(yscrollcommand=listscroll.set)
          listscroll.config(command=self._exampleList.yview)
          listscroll.pack(side="left", fill="y")
  
      # If they select a example, apply it.
      self._exampleList.bind(
          "<<ListboxSelect>>", self._exampleList_select
      )
  
imports: from nltk.parse import MaltParser
  from nltk.sem.drt import DrsDrawer, DrtVariableExpression
  from nltk.sem.glue import DrtGlue
  from nltk.sem.logic import Variable
  from nltk.tag import RegexpTagger
  from nltk.util import in_idle
label_desc: Use image node_id 4 for calling the DrtGlueDemo obj's underlying member method code with example usage: obj._init_exampleListbox(parent) without return types