code: def test_del_attribute(self):
      element = cET.Element("tag")
  
      element.tag = "TAG"
      with self.assertRaises(AttributeError):
          del element.tag
      self.assertEqual(element.tag, "TAG")
  
      with self.assertRaises(AttributeError):
          del element.text
      self.assertIsNone(element.text)
      element.text = "TEXT"
      with self.assertRaises(AttributeError):
          del element.text
      self.assertEqual(element.text, "TEXT")
  
      with self.assertRaises(AttributeError):
          del element.tail
      self.assertIsNone(element.tail)
      element.tail = "TAIL"
      with self.assertRaises(AttributeError):
          del element.tail
      self.assertEqual(element.tail, "TAIL")
  
      with self.assertRaises(AttributeError):
          del element.attrib
      self.assertEqual(element.attrib, {})
      element.attrib = {"A": "B", "C": "D"}
      with self.assertRaises(AttributeError):
          del element.attrib
      self.assertEqual(element.attrib, {"A": "B", "C": "D"})
  
imports: import io
  import struct
  from test import support
  from test.support.import_helper import import_fresh_module
  import types
  import unittest
label_desc: Use image node_id 2 for calling the MiscTests obj's underlying member method code with example usage: obj.test_del_attribute() without return types