code: def test_multipart_no_cte_no_defect(self):
      if self.raise_expected:
          return
      msg = self._str_msg(self.multipart_msg.format(""))
      self.assertEqual(len(self.get_defects(msg)), 0)
  
imports: import textwrap
  import unittest
  import contextlib
  from email import policy
  from email import errors
  from test.test_email import TestEmailBase
label_desc: Use image node_id 5 for calling the TestDefectsBase obj's underlying member method code with example usage: obj.test_multipart_no_cte_no_defect() without return types