code: def test_signedness(self):
      for ctype in (
          wintypes.BYTE,
          wintypes.WORD,
          wintypes.DWORD,
          wintypes.BOOLEAN,
          wintypes.UINT,
          wintypes.ULONG,
      ):
          with self.subTest(ctype=ctype):
              self.assertIsUnsigned(ctype)
  
      for ctype in (wintypes.BOOL, wintypes.INT, wintypes.LONG):
          with self.subTest(ctype=ctype):
              self.assertIsSigned(ctype)
  
file_path: cpython/Lib/test/test_ctypes/test_wintypes.py
imports: import unittest
  from ctypes import POINTER, cast, c_int16
  from ctypes import wintypes
label_desc: Use image node_id 4 for calling the WinTypesTest obj's underlying member method code with example usage: obj.test_signedness() without return types