code: def test_get_from_int(self):
      v = DoubleVar(self.root, 1.23, "name")
      self.assertAlmostEqual(1.23, v.get())
      self.root.globalsetvar("name", "3.45")
      self.assertAlmostEqual(3.45, v.get())
      self.root.globalsetvar("name", "456")
      self.assertAlmostEqual(456, v.get())
  
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 3 for calling the TestDoubleVar obj's underlying member method code with example usage: obj.test_get_from_int() without return types