code: def test_fail(self, path):
      __tracebackhide__ = True
  
      with open(path) as fin:
          lines = fin.readlines()
  
      errors = defaultdict(lambda: "")
  
      output_mypy = self.get_mypy_output()
      self.assertIn(path, output_mypy)
      for error_line in output_mypy[path]:
          error_line = _strip_filename(error_line)
          match = re.match(
              r"(?P<lineno>\d+):(?P<colno>\d+): (error|note): .+$",
              error_line,
          )
          if match is None:
              raise ValueError(
                  f"Unexpected error line format: {error_line}"
              )
          lineno = int(match.group("lineno"))
          errors[lineno] += f"{error_line}\n"
  
      for i, line in enumerate(lines):
          lineno = i + 1
          if line.startswith("#") or (
              " E:" not in line and lineno not in errors
          ):
              continue
  
          target_line = lines[lineno - 1]
          self.assertIn(
              "# E:",
              target_line,
              f"Unexpected mypy output\n\n{errors[lineno]}",
          )
          marker = target_line.split("# E:")[-1].strip()
          expected_error = errors.get(lineno)
          _test_fail(path, marker, expected_error, lineno)
  
imports: import itertools
  import os
  import re
  import shutil
  import unittest
  from collections import defaultdict
  from threading import Lock
  from typing import Dict, IO, List, Optional
  from torch.testing._internal.common_utils import instantiate_parametrized_tests, parametrize, run_tests, TestCase
label_desc: Use image node_id 3 for calling the TestTyping obj's underlying member method code with example usage: obj.test_fail(path) without return types