code: def test_dont_unset_not_existing(self):
      self.assertFalse(self.info_exists("varname"))
      v1 = Variable(self.root, name="name")
      v2 = Variable(self.root, name="name")
      del v1
      support.gc_collect()  # For PyPy or other GCs.
      self.assertFalse(self.info_exists("name"))
      # shouldn't raise exception
      del v2
      support.gc_collect()  # For PyPy or other GCs.
      self.assertFalse(self.info_exists("name"))
  
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 5 for calling the TestVariable obj's underlying member method code with example usage: obj.test_dont_unset_not_existing() without return types