code: def check_format_1(self, x):
      for base, mapper in (
          (2, bin),
          (8, oct),
          (10, str),
          (10, repr),
          (16, hex),
      ):
          got = mapper(x)
          with self.subTest(x=x, mapper=mapper.__name__):
              expected = self.slow_format(x, base)
              self.assertEqual(got, expected)
          with self.subTest(got=got):
              self.assertEqual(int(got, 0), x)
  
imports: import unittest
  from test import support
  import sys
  import random
  import math
  import array
label_desc: Use image node_id 11 for calling the LongTest obj's underlying member method code with example usage: obj.check_format_1(x) without return types