code: def test_intarray_fields(self):
      class SomeInts(Structure):
          _fields_ = [("a", c_int * 4)]
  
      # can use tuple to initialize array (but not list!)
      self.assertEqual(SomeInts((1, 2)).a[:], [1, 2, 0, 0])
      self.assertEqual(SomeInts((1, 2)).a[::], [1, 2, 0, 0])
      self.assertEqual(SomeInts((1, 2)).a[::-1], [0, 0, 2, 1])
      self.assertEqual(SomeInts((1, 2)).a[::2], [1, 0])
      self.assertEqual(SomeInts((1, 2)).a[1:5:6], [2])
      self.assertEqual(SomeInts((1, 2)).a[6:4:-1], [])
      self.assertEqual(SomeInts((1, 2, 3, 4)).a[:], [1, 2, 3, 4])
      self.assertEqual(SomeInts((1, 2, 3, 4)).a[::], [1, 2, 3, 4])
      # too long
      # XXX Should raise ValueError?, not RuntimeError
      self.assertRaises(RuntimeError, SomeInts, (1, 2, 3, 4, 5))
  
imports: import _ctypes_test
  from platform import architecture
  import struct
  import sys
  import unittest
  from ctypes import CDLL, Array, Structure, Union, POINTER, sizeof, byref, alignment, c_void_p, c_char, c_wchar, c_byte, c_ubyte, c_uint8, c_uint16, c_uint32, c_short, c_ushort, c_int, c_uint, c_long, c_ulong, c_longlong, c_ulonglong, c_float, c_double
  from ctypes.util import find_library
  from struct import calcsize
  from collections import namedtuple
  from test import support
  from ._support import _CData, PyCStructType, Py_TPFLAGS_DISALLOW_INSTANTIATION, Py_TPFLAGS_IMMUTABLETYPE
label_desc: Use image node_id 15 for calling the StructureTestCase obj's underlying member method code with example usage: obj.test_intarray_fields() without return types