text: import unittest
  from ctypes import *
  
  class X(Structure):
      _fields_ = [("foo", c_int)]
  
  class TestCase(unittest.TestCase):
      def test_simple(self):
          self.assertRaises((TypeError, AttributeError),
                            delattr, c_int(42), "value")
  
      def test_chararray(self):
          self.assertRaises((TypeError, AttributeError),
                            delattr, (c_char * 5)(), "value")
  
      def test_struct(self):
          self.assertRaises((TypeError, AttributeError),
                            delattr, X(), "foo")
  
  if __name__ == "__main__":
      unittest.main()
  