Commiting answers result in error if answer is not well-formatted

[kevinyang372]

Traceback (most recent call last):
  File "/Users/kevin/Desktop/Github/codeEval/venv/lib/python3.9/site-packages/flask/app.py", line 2447, in wsgi_app
    response = self.full_dispatch_request()
  File "/Users/kevin/Desktop/Github/codeEval/venv/lib/python3.9/site-packages/flask/app.py", line 1952, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/Users/kevin/Desktop/Github/codeEval/venv/lib/python3.9/site-packages/flask/app.py", line 1821, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "/Users/kevin/Desktop/Github/codeEval/venv/lib/python3.9/site-packages/flask/_compat.py", line 39, in reraise
    raise value
  File "/Users/kevin/Desktop/Github/codeEval/venv/lib/python3.9/site-packages/flask/app.py", line 1950, in full_dispatch_request
    rv = self.dispatch_request()
  File "/Users/kevin/Desktop/Github/codeEval/venv/lib/python3.9/site-packages/flask/app.py", line 1936, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/Users/kevin/Desktop/Github/codeEval/venv/lib/python3.9/site-packages/flask_login/utils.py", line 272, in decorated_view
    return func(*args, **kwargs)
  File "web/blueprints/submissions.py", line 68, in submission
    res = temp.test(runtime=setting.runtime, blacklist=setting.get_blacklist())
  File "web/base.py", line 25, in test
    result[entry_point] = self._test_question(runtime, entry_point, blacklist)
  File "web/base.py", line 79, in _test_question
    p.start()
  File "/usr/local/Cellar/python@3.9/3.9.0_1/Frameworks/Python.framework/Versions/3.9/lib/python3.9/multiprocessing/process.py", line 121, in start
    self._popen = self._Popen(self)
  File "/usr/local/Cellar/python@3.9/3.9.0_1/Frameworks/Python.framework/Versions/3.9/lib/python3.9/multiprocessing/context.py", line 224, in _Popen
    return _default_context.get_context().Process._Popen(process_obj)
  File "/usr/local/Cellar/python@3.9/3.9.0_1/Frameworks/Python.framework/Versions/3.9/lib/python3.9/multiprocessing/context.py", line 284, in _Popen
    return Popen(process_obj)
  File "/usr/local/Cellar/python@3.9/3.9.0_1/Frameworks/Python.framework/Versions/3.9/lib/python3.9/multiprocessing/popen_spawn_posix.py", line 32, in __init__
    super().__init__(process_obj)
  File "/usr/local/Cellar/python@3.9/3.9.0_1/Frameworks/Python.framework/Versions/3.9/lib/python3.9/multiprocessing/popen_fork.py", line 19, in __init__
    self._launch(process_obj)
  File "/usr/local/Cellar/python@3.9/3.9.0_1/Frameworks/Python.framework/Versions/3.9/lib/python3.9/multiprocessing/popen_spawn_posix.py", line 47, in _launch
    reduction.dump(process_obj, fp)
  File "/usr/local/Cellar/python@3.9/3.9.0_1/Frameworks/Python.framework/Versions/3.9/lib/python3.9/multiprocessing/reduction.py", line 60, in dump
    ForkingPickler(file, protocol).dump(obj)
AttributeError: Can't pickle local object 'BaseTest._test_question.<locals>.getResult'

[kevinyang372]

For multiprocessing pooling to work, Python pickles and serializes a local copy of the code. However, nested function won't be available at the time of execution as mentioned here

Moving the getResult function to the top level solves the bug.