内核错误：ipykernel NotImplementedError

Question

错误信息

Traceback (most recent call last):
  File "G:\anaconda\envs\jup\lib\runpy.py", line 194, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "G:\anaconda\envs\jup\lib\runpy.py", line 87, in _run_code
    exec(code, run_globals)
  File "C:\Users\sk_np\AppData\Roaming\Python\Python38\site-packages\ipykernel_launcher.py", line 16, in <module>
    app.launch_new_instance()
  File "G:\anaconda\envs\jup\lib\site-packages\traitlets\config\application.py", line 844, in launch_instance
    app.initialize(argv)
  File "G:\anaconda\envs\jup\lib\site-packages\traitlets\config\application.py", line 87, in inner
    return method(app, *args, **kwargs)
  File "C:\Users\sk_np\AppData\Roaming\Python\Python38\site-packages\ipykernel\kernelapp.py", line 448, in initialize    self.init_sockets()
  File "C:\Users\sk_np\AppData\Roaming\Python\Python38\site-packages\ipykernel\kernelapp.py", line 251, in init_sockets
    self.init_iopub(context)
  File "C:\Users\sk_np\AppData\Roaming\Python\Python38\site-packages\ipykernel\kernelapp.py", line 259, in init_iopub    self.iopub_thread = IOPubThread(self.iopub_socket, pipe=True)
  File "C:\Users\sk_np\AppData\Roaming\Python\Python38\site-packages\ipykernel\iostream.py", line 63, in __init__
    self._setup_pipe_in()
  File "C:\Users\sk_np\AppData\Roaming\Python\Python38\site-packages\ipykernel\iostream.py", line 126, in _setup_pipe_in
    self._pipe_in = ZMQStream(pipe_in, self.io_loop)
  File "G:\anaconda\envs\jup\lib\site-packages\zmq\eventloop\zmqstream.py", line 127, in __init__
    self._init_io_state()
  File "G:\anaconda\envs\jup\lib\site-packages\zmq\eventloop\zmqstream.py", line 552, in _init_io_state
    self.io_loop.add_handler(self.socket, self._handle_events, self.io_loop.READ)
  File "G:\anaconda\envs\jup\lib\site-packages\tornado\platform\asyncio.py", line 100, in add_handler
    self.asyncio_loop.add_reader(fd, self._handle_events, fd, IOLoop.READ)
  File "G:\anaconda\envs\jup\lib\asyncio\events.py", line 501, in add_reader
    raise NotImplementedError
NotImplementedError

Conda 环境信息：

• jupyter-client:7.1.2
• jupyter_client:5.3.1
• python:3.8.0

我尝试了This Github Issue，并按照This stackoverflow post的步骤。

复制步骤：

• 安装 anaconda3
• 使用conda create -n env python=3.8 创建 conda 环境
• conda install -c anaconda jupyter
• jupyter notebook

Answer 1

您显然已经安装了anaconda，但也安装了单独的python，看看C:\Users\sk_np\AppData\Roaming\Python\Python38 和G:\anaconda 是如何出现在您的回溯中的。由于包中的不一致，这可能是导致问题的原因。最简单的步骤，也是将来会让您省去很多麻烦的步骤，就是卸载您在

C:\Users\sk_np\AppData\Roaming\Python\Python38

另外，在您的 anaconda 提示符下运行（您尝试从该提示符启动 jupyter）

jupyter kernelspec list

然后删除位于C:\Users\sk_np\AppData\Roaming\Python\Python38 的内核

jupyter kernelspec remove <kernelName>