code: def test_initialization_no_master(self):
      # no master passing
      with swap_attr(tkinter, "_default_root", None), swap_attr(
          tkinter, "_support_default_root", True
      ):
          try:
              x = ttk.LabeledScale()
              self.assertIsNotNone(tkinter._default_root)
              self.assertEqual(x.master, tkinter._default_root)
              self.assertEqual(x.tk, tkinter._default_root.tk)
              x.destroy()
          finally:
              destroy_default_root()
  
imports: import sys
  import unittest
  import Tkinter
  import ttk
  from test.test_support import requires, run_unittest, swap_attr
  from test_ttk.support import AbstractTkTest, destroy_default_root
label_desc: Use image node_id 3 for calling the LabeledScaleTest obj's underlying member method code with example usage: obj.test_initialization_no_master() without return types