code: def test_payload_encoding(self):
      jcode = "euc-jp"
      jhello = str(
          b"\xa5\xcf\xa5\xed\xa1\xbc\xa5\xef\xa1\xbc"
          b"\xa5\xeb\xa5\xc9\xa1\xaa",
          jcode,
      )
      msg = Message()
      msg.set_payload(jhello, jcode)
      ustr = msg.get_payload(decode=True).decode(
          msg.get_content_charset()
      )
      self.assertEqual(jhello, ustr)
  
file_path: cpython/Lib/test/test_email/test_asian_codecs.py
imports: import unittest
  from test.test_email import TestEmailBase
  from email.charset import Charset
  from email.header import Header, decode_header
  from email.message import Message
label_desc: Use image node_id 3 for calling the TestEmailAsianCodecs obj's underlying member method code with example usage: obj.test_payload_encoding() without return types