code: def test_sizes(self):
      for t in signed_types + unsigned_types + float_types + bool_types:
          try:
              size = struct.calcsize(t._type_)
          except struct.error:
              continue
          # sizeof of the type...
          self.assertEqual(sizeof(t), size)
          # and sizeof of an instance
          self.assertEqual(sizeof(t()), size)
  
imports: import array
  import struct
  import sys
  import unittest
  from operator import truth
  from ctypes import byref, sizeof, alignment, c_char, c_byte, c_ubyte, c_short, c_ushort, c_int, c_uint, c_long, c_ulong, c_longlong, c_ulonglong, c_float, c_double, c_longdouble, c_bool
label_desc: Use image node_id 10 for calling the NumberTestCase obj's underlying member method code with example usage: obj.test_sizes() without return types