PyWebIO不能直接在Windows服务中调用

[cute-omega]

BUG描述
在Python中编写Windows服务的一般方法是继承win32serviceutil.ServiceFramework类并实现__init__(self, args), SvcDoRun(self), SvcStop(self)方法与_svc_name_:str, _svc_display_name_:str, _svc_description_:str属性，然后在__main__中注册该服务类并等待Windows调用。
但我在SvcDoRun()中尝试使用pywebio.start_server()时却在【计算机管理/事件查看器/Windows日志/应用程序】中发现如下错误信息：

The instance's SvcRun() method failed 
Traceback (most recent call last):
  File "C:\Users\Nobody\miniconda3\Lib\site-packages\win32\lib\win32serviceutil.py", line 1071, in SvcRun
    self.SvcDoRun()
  File "C:\Users\Nobody\Desktop\Programs\Projects\Python\wifi-test\python_winsvc.py", line 111, in SvcDoRun
    WirelessNetworkMonitor.main()
  File "C:\Users\Nobody\Desktop\Programs\Projects\Python\wifi-test\WirelessNetworkMonitor.py", line 237, in main
    start_server(scan, debug=config["debug"], port=config["port"])
  File "C:\Users\Nobody\miniconda3\Lib\site-packages\pywebio\platform\tornado.py", line 273, in start_server
    set_ioloop(tornado.ioloop.IOLoop.current())  # to enable bokeh app
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\Nobody\miniconda3\Lib\site-packages\tornado\ioloop.py", line 274, in current
    loop = asyncio.get_event_loop()
           ^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\Nobody\miniconda3\Lib\asyncio\events.py", line 699, in get_event_loop
    self.set_event_loop(self.new_event_loop())
                        ^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\Nobody\miniconda3\Lib\asyncio\events.py", line 720, in new_event_loop
    return self._loop_factory()
           ^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\Nobody\miniconda3\Lib\asyncio\windows_events.py", line 316, in __init__
    super().__init__(proactor)
  File "C:\Users\Nobody\miniconda3\Lib\asyncio\proactor_events.py", line 643, in __init__
    signal.set_wakeup_fd(self._csock.fileno())
ValueError: set_wakeup_fd only works in main thread of the main interpreter

显然问题出在pywebio库中（我的代码中没有使用多线程）。这里也不是User's guide中提到的没有使用register_thread(thread)的问题（显然程序没有像文档所示的那样报pywebio.exceptions.SessionNotFoundException异常）
这恐怕是一个严重（虽然不常见，毕竟目前没有看到同样在Windows服务中使用PyWebIO的issue）且麻烦的bug，天知道为什么这个bug从asyncio波及到tornado再到pywebio。如果可以的话我希望先得到一个可用的缓解措施。（我尝试用其他后端框架再试一遍）
改用flask，报错：

The instance's SvcRun() method failed 
Traceback (most recent call last):
  File "C:\Users\Nobody\miniconda3\Lib\site-packages\win32\lib\win32serviceutil.py", line 1071, in SvcRun
    self.SvcDoRun()
  File "C:\Users\Nobody\Desktop\Programs\Projects\Python\wifi-test\python_winsvc.py", line 111, in SvcDoRun
    WirelessNetworkMonitor.main()
  File "C:\Users\Nobody\Desktop\Programs\Projects\Python\wifi-test\WirelessNetworkMonitor.py", line 237, in main
    start_server(scan, debug=config["debug"], port=config["port"])
  File "C:\Users\Nobody\miniconda3\Lib\site-packages\pywebio\platform\flask.py", line 181, in start_server
    app.run(host=host, port=port, debug=debug, threaded=True, use_evalex=False, **flask_options)
  File "C:\Users\Nobody\miniconda3\Lib\site-packages\flask\app.py", line 662, in run
    run_simple(t.cast(str, host), port, self, **options)
  File "C:\Users\Nobody\miniconda3\Lib\site-packages\werkzeug\serving.py", line 1115, in run_simple
    run_with_reloader(
  File "C:\Users\Nobody\miniconda3\Lib\site-packages\werkzeug\_reloader.py", line 452, in run_with_reloader
    signal.signal(signal.SIGTERM, lambda *args: sys.exit(0))
  File "C:\Users\Nobody\miniconda3\Lib\signal.py", line 58, in signal
    handler = _signal.signal(_enum_to_int(signalnum), _enum_to_int(handler))
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
ValueError: signal only works in main thread of the main interpreter

改用django，报错

The instance's SvcRun() method failed 
Traceback (most recent call last):
  File "C:\Users\Nobody\miniconda3\Lib\site-packages\win32\lib\win32serviceutil.py", line 1071, in SvcRun
    self.SvcDoRun()
  File "C:\Users\Nobody\Desktop\Programs\Projects\Python\wifi-test\python_winsvc.py", line 111, in SvcDoRun
    WirelessNetworkMonitor.main()
  File "C:\Users\Nobody\Desktop\Programs\Projects\Python\wifi-test\WirelessNetworkMonitor.py", line 237, in main
    start_server(scan, debug=config["debug"], port=config["port"])
  File "C:\Users\Nobody\miniconda3\Lib\site-packages\pywebio\platform\django.py", line 214, in start_server
    http_server.listen(port, address=host)
  File "C:\Users\Nobody\miniconda3\Lib\site-packages\tornado\tcpserver.py", line 191, in listen
    self.add_sockets(sockets)
  File "C:\Users\Nobody\miniconda3\Lib\site-packages\tornado\tcpserver.py", line 204, in add_sockets
    self._handlers[sock.fileno()] = add_accept_handler(
                                    ^^^^^^^^^^^^^^^^^^^
  File "C:\Users\Nobody\miniconda3\Lib\site-packages\tornado\netutil.py", line 247, in add_accept_handler
    io_loop = IOLoop.current()
              ^^^^^^^^^^^^^^^^
  File "C:\Users\Nobody\miniconda3\Lib\site-packages\tornado\ioloop.py", line 274, in current
    loop = asyncio.get_event_loop()
           ^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\Nobody\miniconda3\Lib\asyncio\events.py", line 699, in get_event_loop
    self.set_event_loop(self.new_event_loop())
                        ^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\Nobody\miniconda3\Lib\asyncio\events.py", line 720, in new_event_loop
    return self._loop_factory()
           ^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\Nobody\miniconda3\Lib\asyncio\windows_events.py", line 316, in __init__
    super().__init__(proactor)
  File "C:\Users\Nobody\miniconda3\Lib\asyncio\proactor_events.py", line 643, in __init__
    signal.set_wakeup_fd(self._csock.fileno())
ValueError: set_wakeup_fd only works in main thread of the main interpreter

改用aiohttp报错

The instance's SvcRun() method failed 
Traceback (most recent call last):
  File "C:\Users\Nobody\miniconda3\Lib\site-packages\win32\lib\win32serviceutil.py", line 1071, in SvcRun
    self.SvcDoRun()
  File "C:\Users\Nobody\Desktop\Programs\Projects\Python\wifi-test\python_winsvc.py", line 111, in SvcDoRun
    WirelessNetworkMonitor.main()
  File "C:\Users\Nobody\Desktop\Programs\Projects\Python\wifi-test\WirelessNetworkMonitor.py", line 237, in main
    start_server(scan, debug=config["debug"], port=config["port"])
  File "C:\Users\Nobody\miniconda3\Lib\site-packages\pywebio\platform\aiohttp.py", line 222, in start_server
    web.run_app(app, host=host, port=port)
  File "C:\Users\Nobody\miniconda3\Lib\site-packages\aiohttp\web.py", line 486, in run_app
    loop = asyncio.new_event_loop()
           ^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\Nobody\miniconda3\Lib\asyncio\events.py", line 823, in new_event_loop
    return get_event_loop_policy().new_event_loop()
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\Nobody\miniconda3\Lib\asyncio\events.py", line 720, in new_event_loop
    return self._loop_factory()
           ^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\Nobody\miniconda3\Lib\asyncio\windows_events.py", line 316, in __init__
    super().__init__(proactor)
  File "C:\Users\Nobody\miniconda3\Lib\asyncio\proactor_events.py", line 643, in __init__
    signal.set_wakeup_fd(self._csock.fileno())
ValueError: set_wakeup_fd only works in main thread of the main interpreter

改用fastapi报错

The instance's SvcRun() method failed 
Traceback (most recent call last):
  File "C:\Users\Nobody\miniconda3\Lib\site-packages\win32\lib\win32serviceutil.py", line 1071, in SvcRun
    self.SvcDoRun()
  File "C:\Users\Nobody\Desktop\Programs\Projects\Python\wifi-test\python_winsvc.py", line 111, in SvcDoRun
    WirelessNetworkMonitor.main()
  File "C:\Users\Nobody\Desktop\Programs\Projects\Python\wifi-test\WirelessNetworkMonitor.py", line 237, in main
    start_server(scan, debug=config["debug"], port=config["port"])
  File "C:\Users\Nobody\miniconda3\Lib\site-packages\pywebio\platform\fastapi.py", line 187, in start_server
    uvicorn.run(app, host=host, port=port, **uvicorn_settings)
  File "C:\Users\Nobody\miniconda3\Lib\site-packages\uvicorn\main.py", line 516, in run
    config = Config(
             ^^^^^^^
  File "C:\Users\Nobody\miniconda3\Lib\site-packages\uvicorn\config.py", line 273, in __init__
    self.configure_logging()
  File "C:\Users\Nobody\miniconda3\Lib\site-packages\uvicorn\config.py", line 365, in configure_logging
    logging.config.dictConfig(self.log_config)
  File "C:\Users\Nobody\miniconda3\Lib\logging\config.py", line 914, in dictConfig
    dictConfigClass(config).configure()
  File "C:\Users\Nobody\miniconda3\Lib\logging\config.py", line 563, in configure
    raise ValueError('Unable to configure '
ValueError: Unable to configure formatter 'default'

环境信息

• 操作系统及版本: Microsoft Windows 11 x86-64 24H2 (OS内部版本26100.2454)
• 浏览器及版本: 【与问题无关】
• Python版本: Python 3.12.3
• 库版本（由conda export导出）: ```yaml
  name: base
  channels:
• https://mirrors.sjtug.sjtu.edu.cn/anaconda/cloud/conda-forge
• conda-forge
• https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/conda-forge/
• https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main/
• https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/
• https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/msys2
• https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/pro
• https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/r
• https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free
• https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main
• defaults
• https://repo.anaconda.com/pkgs/main
• https://repo.anaconda.com/pkgs/r
• https://repo.anaconda.com/pkgs/msys2
  dependencies:
• aiofiles=24.1.0=pyhd8ed1ab_1
• aiohappyeyeballs=2.4.4=pyhd8ed1ab_1
• aiohttp=3.11.10=py312h31fea79_0
• aiosignal=1.3.1=pyhd8ed1ab_1
• anaconda-anon-usage=0.4.4=py312hfc23b7f_100
• anaconda_powershell_prompt=1.1.0=haa95532_0
• anaconda_prompt=1.1.0=haa95532_0
• annotated-types=0.7.0=pyhd8ed1ab_1
• anyio=4.7.0=pyhd8ed1ab_0
• archspec=0.2.3=pyhd3eb1b0_0
• asgiref=3.8.1=pyhd8ed1ab_1
• attrs=24.2.0=pyh71513ae_1
• blinker=1.9.0=pyhff2d567_0
• boltons=23.0.0=py312haa95532_0
• brotli-python=1.0.9=py312hd77b12b_8
• bzip2=1.0.8=h2bbff1b_6
• ca-certificates=2024.9.24=haa95532_0
• certifi=2024.8.30=pyhd8ed1ab_0
• cffi=1.17.1=py312h827c3e9_0
• charset-normalizer=3.3.2=pyhd3eb1b0_0
• click=8.1.7=win_pyh7428d3b_1
• colorama=0.4.6=py312haa95532_0
• conda=24.11.0=py312h2e8e312_0
• conda-content-trust=0.2.0=py312haa95532_1
• conda-libmamba-solver=24.9.0=pyhd3eb1b0_0
• conda-package-handling=2.3.0=py312haa95532_0
• conda-package-streaming=0.10.0=py312haa95532_0
• cryptography=43.0.0=py312h89fc84f_0
• distro=1.9.0=py312haa95532_0
• django=5.1.4=pyhd8ed1ab_0
• dnspython=2.7.0=pyhff2d567_1
• email-validator=2.2.0=pyhd8ed1ab_1
• email_validator=2.2.0=hd8ed1ab_1
• et_xmlfile=2.0.0=pyhd8ed1ab_1
• exceptiongroup=1.2.2=pyhd8ed1ab_1
• expat=2.6.3=h5da7b33_0
• fastapi=0.115.6=pyhd8ed1ab_0
• fastapi-cli=0.0.6=pyhd8ed1ab_0
• flask=3.1.0=pyhff2d567_0
• fmt=9.1.0=h6d14046_1
• frozendict=2.4.2=py312haa95532_0
• frozenlist=1.5.0=py312h4389bb4_0
• h11=0.14.0=pyhd8ed1ab_1
• h2=4.1.0=pyhd8ed1ab_1
• hpack=4.0.0=pyhd8ed1ab_1
• httpcore=1.0.7=pyh29332c3_1
• httptools=0.6.4=py312h4389bb4_0
• httpx=0.28.1=pyhd8ed1ab_0
• hyperframe=6.0.1=pyhd8ed1ab_1
• idna=3.7=py312haa95532_0
• importlib-metadata=8.5.0=pyha770c72_1
• itsdangerous=2.2.0=pyhd8ed1ab_1
• jinja2=3.1.4=pyhd8ed1ab_1
• jsonpatch=1.33=py312haa95532_1
• jsonpointer=2.1=pyhd3eb1b0_0
• libarchive=3.7.4=h9243413_0
• libcurl=8.9.1=h0416ee5_0
• libexpat=2.6.3=he0c23c2_0
• libffi=3.4.4=hd77b12b_1
• libiconv=1.16=h2bbff1b_3
• libmamba=1.5.8=h99b1521_3
• libmambapy=1.5.8=py312h77c03ed_3
• libsolv=0.7.24=h23ce68f_1
• libsqlite=3.47.2=h67fdade_0
• libssh2=1.11.0=h291bd65_0
• libxml2=2.13.1=h24da03e_2
• libzlib=1.2.13=h2466b09_6
• lz4-c=1.9.4=h2bbff1b_1
• markdown-it-py=3.0.0=pyhd8ed1ab_1
• markupsafe=3.0.2=py312h31fea79_1
• mdurl=0.1.2=pyhd8ed1ab_1
• menuinst=2.1.2=py312h5da7b33_0
• multidict=6.1.0=py312h31fea79_1
• openpyxl=3.1.5=py312he70551f_1
• openssl=3.4.0=h2466b09_0
• packaging=24.1=py312haa95532_0
• pcre2=10.42=h0ff8eda_1
• pip=24.2=py312haa95532_0
• platformdirs=3.10.0=py312haa95532_0
• pluggy=1.0.0=py312haa95532_1
• propcache=0.2.1=py312h4389bb4_0
• pybind11-abi=5=hd3eb1b0_0
• pycosat=0.6.6=py312h2bbff1b_1
• pycparser=2.21=pyhd3eb1b0_0
• pydantic=2.10.3=pyh3cfb1c2_0
• pydantic-core=2.27.1=py312h2615798_0
• pygments=2.18.0=pyhd8ed1ab_1
• pysocks=1.7.1=py312haa95532_0
• python=3.12.3=h2628c8c_0_cpython
• python-dotenv=1.0.1=pyhd8ed1ab_1
• python-multipart=0.0.19=pyhff2d567_1
• python_abi=3.12=5_cp312
• pywin32=307=py312h275cf98_3
• pyyaml=6.0.2=py312h4389bb4_1
• reproc=14.2.4=hd77b12b_2
• reproc-cpp=14.2.4=hd77b12b_2
• requests=2.32.3=pyhd8ed1ab_1
• rich=13.9.4=pyhd8ed1ab_1
• rich-toolkit=0.11.3=pyh29332c3_0
• ruamel.yaml=0.18.6=py312h827c3e9_0
• ruamel.yaml.clib=0.2.8=py312h827c3e9_0
• setuptools=75.1.0=py312haa95532_0
• shellingham=1.5.4=pyhd8ed1ab_1
• sniffio=1.3.1=pyhd8ed1ab_1
• sqlite=3.45.3=h2bbff1b_0
• sqlparse=0.5.2=pyhd8ed1ab_1
• starlette=0.41.3=pyha770c72_1
• tk=8.6.14=h0416ee5_0
• tornado=6.4.2=py312h4389bb4_0
• tqdm=4.66.5=py312hfc267ef_0
• truststore=0.8.0=py312haa95532_0
• typer=0.15.1=pyhd8ed1ab_0
• typer-slim=0.15.1=pyhd8ed1ab_0
• typer-slim-standard=0.15.1=hd8ed1ab_0
• typing-extensions=4.12.2=hd8ed1ab_1
• typing_extensions=4.12.2=pyha770c72_1
• tzdata=2024b=h04d1e81_0
• ucrt=10.0.22621.0=h57928b3_1
• urllib3=2.2.3=py312haa95532_0
• uvicorn=0.32.1=pyh5737063_1
• uvicorn-standard=0.32.1=h5737063_1
• vc=14.40=h2eaa2aa_1
• vc14_runtime=14.42.34433=he29a5d6_23
• vs2015_runtime=14.42.34433=hdffcdeb_23
• watchfiles=1.0.0=py312h2615798_0
• websockets=14.1=py312h4389bb4_0
• werkzeug=3.1.3=pyhd8ed1ab_1
• wheel=0.44.0=py312haa95532_0
• win_inet_pton=1.1.0=py312haa95532_0
• xz=5.4.6=h8cc25b3_1
• yaml=0.2.5=h8ffe710_2
• yaml-cpp=0.8.0=hd77b12b_1
• yarl=1.18.3=py312h4389bb4_0
• zipp=3.21.0=pyhd8ed1ab_1
• zlib=1.2.13=h2466b09_6
• zstandard=0.23.0=py312h4fc1ca9_0
• zstd=1.5.6=h8880b57_0
• pip:
  • pywebio==1.8.3
  • ua-parser==1.0.0
  • ua-parser-builtins==0.18.0.post1
  • user-agents==2.2.0
  • wxpusher==2.3.0
    prefix: C:\Users\Nobody\miniconda3

[wang0618]

请尝试一下 该回答 中的方案可不可用