code: def test_resize(self):
      class X(Structure):
          _fields_ = [("item", c_int), ("array", c_int * 1)]
  
      self.assertEqual(sizeof(X), sizeof(c_int) * 2)
      x = X()
      x.item = 42
      x.array[0] = 100
      self.assertEqual(sizeof(x), sizeof(c_int) * 2)
  
      # make room for one additional item
      new_size = sizeof(X) + sizeof(c_int) * 1
      resize(x, new_size)
      self.assertEqual(sizeof(x), new_size)
      self.assertEqual((x.item, x.array[0]), (42, 100))
  
      # make room for 10 additional items
      new_size = sizeof(X) + sizeof(c_int) * 9
      resize(x, new_size)
      self.assertEqual(sizeof(x), new_size)
      self.assertEqual((x.item, x.array[0]), (42, 100))
  
      # make room for one additional item
      new_size = sizeof(X) + sizeof(c_int) * 1
      resize(x, new_size)
      self.assertEqual(sizeof(x), new_size)
      self.assertEqual((x.item, x.array[0]), (42, 100))
  
imports: from ctypes import *
  import unittest
label_desc: Use image node_id 1 for calling the VarSizeTest obj's underlying member method code with example usage: obj.test_resize() without return types