code: def test___del__(self):
      self.assertFalse(self.info_exists("varname"))
      v = Variable(self.root, "sample string", "varname")
      self.assertTrue(self.info_exists("varname"))
      del v
      support.gc_collect()  # For PyPy or other GCs.
      self.assertFalse(self.info_exists("varname"))
  
imports: import unittest
  from test import support
  import gc
  import tkinter
  from tkinter import Variable, StringVar, IntVar, DoubleVar, BooleanVar, Tcl, TclError
  from test.support import ALWAYS_EQ
  from test.test_tkinter.support import AbstractDefaultRootTest
label_desc: Use image node_id 4 for calling the TestVariable obj's underlying member method code with example usage: obj.test___del__() without return types