Jupyter Notebook 无法在 Windows 10 中以 python 3.8 启动 [英] Jupyter notebook cannot start with python 3.8 in Windows 10

问题描述

这是在 python 版本 3.8 下启动 jupyter notebook 时的详细错误

Here is the detailed error when launching jupyter notebook with python version 3.8

  File "c:userskokatappdatalocalprogramspythonpython38lib
unpy.py", line 192, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "c:userskokatappdatalocalprogramspythonpython38lib
unpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "C:UserskokatAppDataLocalProgramsPythonPython38Scriptsjupyter-notebook.EXE\__main__.py", line 9, in <module>
  File "c:userskokatappdatalocalprogramspythonpython38libsite-packagesjupyter_coreapplication.py", line 266, in launch_instance
    return super(JupyterApp, cls).launch_instance(argv=argv, **kwargs)
  File "c:userskokatappdatalocalprogramspythonpython38libsite-packages	raitletsconfigapplication.py", line 657, in launch_instance
    app.initialize(argv)
  File "<c:userskokatappdatalocalprogramspythonpython38libsite-packagesdecorator.py:decorator-gen-7>", line 2, in initialize
  File "c:userskokatappdatalocalprogramspythonpython38libsite-packages	raitletsconfigapplication.py", line 87, in catch_config_error
    return method(app, *args, **kwargs)
  File "c:userskokatappdatalocalprogramspythonpython38libsite-packages
otebook
otebookapp.py", line 1628, in initialize
    self.init_webapp()
  File "c:userskokatappdatalocalprogramspythonpython38libsite-packages
otebook
otebookapp.py", line 1407, in init_webapp
    self.http_server.listen(port, self.ip)
  File "c:userskokatappdatalocalprogramspythonpython38libsite-packages	ornado	cpserver.py", line 144, in listen
    self.add_sockets(sockets)
  File "c:userskokatappdatalocalprogramspythonpython38libsite-packages	ornado	cpserver.py", line 157, in add_sockets
    self._handlers[sock.fileno()] = add_accept_handler(
  File "c:userskokatappdatalocalprogramspythonpython38libsite-packages	ornado
etutil.py", line 268, in add_accept_handler
    io_loop.add_handler(sock, accept_handler, IOLoop.READ)
  File "c:userskokatappdatalocalprogramspythonpython38libsite-packages	ornadoplatformasyncio.py", line 79, in add_handler
    self.asyncio_loop.add_reader(
  File "c:userskokatappdatalocalprogramspythonpython38libasyncioevents.py", line 498, in add_reader
    raise NotImplementedError
NotImplementedError

任何帮助将不胜感激.

推荐答案

遵循 这个线程，我已经解决了这个问题:

Following one of the comments in this thread, I've solved the problem by:

1. 找到并打开 asyncio.py 文件.就我而言，它位于 C:Users[USERNAME]AppDataLocalProgramsPythonPython38-32Libsite-packages ornadoplatform
2. 在 import asyncio 行之后添加以下内容:

1. Locate and open the asyncio.py file. In my case it's in C:Users[USERNAME]AppDataLocalProgramsPythonPython38-32Libsite-packages ornadoplatform
2. After the line import asyncio add the following:

from sys import platform 
if platform == "win32":               
    asyncio.set_event_loop_policy(asyncio.WindowsSelectorEventLoopPolicy()) # python-3.8.0a4

这将强制在 Windows 上使用 SelectorEventLoop.

This will force using SelectorEventLoop on Windows.

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