An attempt has been made to start a new process before the current process has finished its bootstra

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "E:\Eprogramfiles\Anaconda3\lib\multiprocessing\spawn.py", line 116, in spawn_main
    exitcode = _main(fd, parent_sentinel)
  File "E:\Eprogramfiles\Anaconda3\lib\multiprocessing\spawn.py", line 125, in _main
    prepare(preparation_data)
  File "E:\Eprogramfiles\Anaconda3\lib\multiprocessing\spawn.py", line 236, in prepare
    _fixup_main_from_path(data['init_main_from_path'])
  File "E:\Eprogramfiles\Anaconda3\lib\multiprocessing\spawn.py", line 287, in _fixup_main_from_path
    main_content = runpy.run_path(main_path,
  File "E:\Eprogramfiles\Anaconda3\lib\runpy.py", line 265, in run_path
    return _run_module_code(code, init_globals, run_name,
  File "E:\Eprogramfiles\Anaconda3\lib\runpy.py", line 97, in _run_module_code
    _run_code(code, mod_globals, init_globals,
  File "E:\Eprogramfiles\Anaconda3\lib\runpy.py", line 87, in _run_code
    exec(code, run_globals)
  File "E:\other\lightvit\bert_test_demo01.py", line 100, in <module>
    for i, batch in enumerate(train):
  File "E:\Eprogramfiles\Anaconda3\lib\site-packages\torch\utils\data\dataloader.py", line 359, in __iter__
    return self._get_iterator()
  File "E:\Eprogramfiles\Anaconda3\lib\site-packages\torch\utils\data\dataloader.py", line 305, in _get_iterator
    return _MultiProcessingDataLoaderIter(self)
  File "E:\Eprogramfiles\Anaconda3\lib\site-packages\torch\utils\data\dataloader.py", line 918, in __init__
    w.start()
  File "E:\Eprogramfiles\Anaconda3\lib\multiprocessing\process.py", line 121, in start
    self._popen = self._Popen(self)
  File "E:\Eprogramfiles\Anaconda3\lib\multiprocessing\context.py", line 224, in _Popen
    return _default_context.get_context().Process._Popen(process_obj)
  File "E:\Eprogramfiles\Anaconda3\lib\multiprocessing\context.py", line 327, in _Popen
    return Popen(process_obj)
  File "E:\Eprogramfiles\Anaconda3\lib\multiprocessing\popen_spawn_win32.py", line 45, in __init__
    prep_data = spawn.get_preparation_data(process_obj._name)
  File "E:\Eprogramfiles\Anaconda3\lib\multiprocessing\spawn.py", line 154, in get_preparation_data
    _check_not_importing_main()
  File "E:\Eprogramfiles\Anaconda3\lib\multiprocessing\spawn.py", line 134, in _check_not_importing_main
    raise RuntimeError('''
RuntimeError:
        An attempt has been made to start a new process before the
        current process has finished its bootstrapping phase.

        This probably means that you are not using fork to start your
        child processes and you have forgotten to use the proper idiom
        in the main module:

            if __name__ == '__main__':
                freeze_support()
                ...

        The "freeze_support()" line can be omitted if the program
        is not going to be frozen to produce an executable.

报错的原因 ：
linux系统中可以使用多个子进程加载数据，windows系统里是不可以的，  num_workers的设置，设置为0或者采用默认为0的设置。

===========================================================

E:\Eprogramfiles\Anaconda3\python.exe E:/other/lightvit/bert_test_demo01.py
'HTTPSConnectionPool(host='huggingface.co', port=443): Max retries exceeded with url: /bert-base-chinese/resolve/main/tokenizer_config.json (Caused by ProxyError('Cannot connect to proxy.', NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x0000024FA9894370>: Failed to establish a new connection: [WinError 10061] No connection could be made because the target machine actively refused it')))' thrown while requesting HEAD https://huggingface.co/bert-base-chinese/resolve/main/tokenizer_config.json
Traceback (most recent call last):
  File "E:\Eprogramfiles\Anaconda3\lib\site-packages\urllib3\connection.py", line 159, in _new_conn
    conn = connection.create_connection(
  File "E:\Eprogramfiles\Anaconda3\lib\site-packages\urllib3\util\connection.py", line 84, in create_connection
    raise err
  File "E:\Eprogramfiles\Anaconda3\lib\site-packages\urllib3\util\connection.py", line 74, in create_connection
    sock.connect(sa)
ConnectionRefusedError: [WinError 10061] No connection could be made because the target machine actively refused it

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "E:\Eprogramfiles\Anaconda3\lib\site-packages\urllib3\connectionpool.py", line 667, in urlopen
    self._prepare_proxy(conn)
  File "E:\Eprogramfiles\Anaconda3\lib\site-packages\urllib3\connectionpool.py", line 932, in _prepare_proxy
    conn.connect()
  File "E:\Eprogramfiles\Anaconda3\lib\site-packages\urllib3\connection.py", line 309, in connect
    conn = self._new_conn()
  File "E:\Eprogramfiles\Anaconda3\lib\site-packages\urllib3\connection.py", line 171, in _new_conn
    raise NewConnectionError(
urllib3.exceptions.NewConnectionError: <urllib3.connection.HTTPSConnection object at 0x0000024FA9894370>: Failed to establish a new connection: [WinError 10061] No connection could be made because the target machine actively refused it

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "E:\Eprogramfiles\Anaconda3\lib\site-packages\requests\adapters.py", line 439, in send
    resp = conn.urlopen(
  File "E:\Eprogramfiles\Anaconda3\lib\site-packages\urllib3\connectionpool.py", line 726, in urlopen
    retries = retries.increment(
  File "E:\Eprogramfiles\Anaconda3\lib\site-packages\urllib3\util\retry.py", line 446, in increment
    raise MaxRetryError(_pool, url, error or ResponseError(cause))
urllib3.exceptions.MaxRetryError: HTTPSConnectionPool(host='huggingface.co', port=443): Max retries exceeded with url: /bert-base-chinese/resolve/main/tokenizer_config.json (Caused by ProxyError('Cannot connect to proxy.', NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x0000024FA9894370>: Failed to establish a new connection: [WinError 10061] No connection could be made because the target machine actively refused it')))

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "E:/other/lightvit/bert_test_demo01.py", line 72, in <module>
    train = Data.DataLoader(dataset=MyDataset(sentences, labels), batch_size=batch_size, shuffle=True, num_workers=1)
  File "E:/other/lightvit/bert_test_demo01.py", line 44, in __init__
    self.tokenizer = AutoTokenizer.from_pretrained(model)
  File "E:\Eprogramfiles\Anaconda3\lib\site-packages\transformers\models\auto\tokenization_auto.py", line 643, in from_pretrained
    tokenizer_config = get_tokenizer_config(pretrained_model_name_or_path, **kwargs)
  File "E:\Eprogramfiles\Anaconda3\lib\site-packages\transformers\models\auto\tokenization_auto.py", line 487, in get_tokenizer_config
    resolved_config_file = cached_file(
  File "E:\Eprogramfiles\Anaconda3\lib\site-packages\transformers\utils\hub.py", line 417, in cached_file
    resolved_file = hf_hub_download(
  File "E:\Eprogramfiles\Anaconda3\lib\site-packages\huggingface_hub\utils\_validators.py", line 120, in _inner_fn
    return fn(*args, **kwargs)
  File "E:\Eprogramfiles\Anaconda3\lib\site-packages\huggingface_hub\file_download.py", line 1195, in hf_hub_download
    metadata = get_hf_file_metadata(
  File "E:\Eprogramfiles\Anaconda3\lib\site-packages\huggingface_hub\utils\_validators.py", line 120, in _inner_fn
    return fn(*args, **kwargs)
  File "E:\Eprogramfiles\Anaconda3\lib\site-packages\huggingface_hub\file_download.py", line 1532, in get_hf_file_metadata
    r = _request_wrapper(
  File "E:\Eprogramfiles\Anaconda3\lib\site-packages\huggingface_hub\file_download.py", line 407, in _request_wrapper
    response = _request_wrapper(
  File "E:\Eprogramfiles\Anaconda3\lib\site-packages\huggingface_hub\file_download.py", line 442, in _request_wrapper
    return http_backoff(
  File "E:\Eprogramfiles\Anaconda3\lib\site-packages\huggingface_hub\utils\_http.py", line 228, in http_backoff
    raise err
  File "E:\Eprogramfiles\Anaconda3\lib\site-packages\huggingface_hub\utils\_http.py", line 212, in http_backoff
    response = session.request(method=method, url=url, **kwargs)
  File "E:\Eprogramfiles\Anaconda3\lib\site-packages\requests\sessions.py", line 530, in request
    resp = self.send(prep, **send_kwargs)
  File "E:\Eprogramfiles\Anaconda3\lib\site-packages\requests\sessions.py", line 643, in send
    r = adapter.send(request, **kwargs)
  File "E:\Eprogramfiles\Anaconda3\lib\site-packages\requests\adapters.py", line 510, in send
    raise ProxyError(e, request=request)
requests.exceptions.ProxyError: HTTPSConnectionPool(host='huggingface.co', port=443): Max retries exceeded with url: /bert-base-chinese/resolve/main/tokenizer_config.json (Caused by ProxyError('Cannot connect to proxy.', NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x0000024FA9894370>: Failed to establish a new connection: [WinError 10061] No connection could be made because the target machine actively refused it')))

Process finished with exit code 1

解决方法：FQ
=============================================

=============================================

=============================================