vscode 未检测到 ipykernel，已验证它实际上已安装

Question

每次我尝试创建新笔记本时，Jupyter 笔记本都无法启动。 它说 ipykernel 没有安装，如果我点击安装它说它已经为这个虚拟环境安装（使用 anaconda3 创建），然后它只是给我一个错误消息，我将在下面粘贴。 关于导致此问题或如何解决此问题的任何想法？ 提前致谢！

Jupyter notebook failed to launch. 
Error: Traceback (most recent call last):
  File "c:\Users\davis\.vscode\extensions\ms-python.python-2020.6.91350\pythonFiles\vscode_datascience_helpers\daemon\daemon_python.py", line 54, in _decorator
    return func(self, *args, **kwargs)
  File "c:\Users\davis\.vscode\extensions\ms-python.python-2020.6.91350\pythonFiles\vscode_datascience_helpers\jupyter_daemon.py", line 105, in m_exec_module_observable
    self._start_notebook(args, cwd, env)
  File "c:\Users\davis\.vscode\extensions\ms-python.python-2020.6.91350\pythonFiles\vscode_datascience_helpers\jupyter_daemon.py", line 147, in _start_notebook
    from notebook import notebookapp as app
  File "C:\Users\davis\AppData\Roaming\Python\Python38\site-packages\notebook\notebookapp.py", line 49, in <module>
    from zmq.eventloop import ioloop
  File "C:\Users\davis\AppData\Roaming\Python\Python38\site-packages\zmq\__init__.py", line 47, in <module>
    from zmq import backend
  File "C:\Users\davis\AppData\Roaming\Python\Python38\site-packages\zmq\backend\__init__.py", line 40, in <module>
    reraise(*exc_info)
  File "C:\Users\davis\AppData\Roaming\Python\Python38\site-packages\zmq\utils\sixcerpt.py", line 34, in reraise
    raise value
  File "C:\Users\davis\AppData\Roaming\Python\Python38\site-packages\zmq\backend\__init__.py", line 27, in <module>
    _ns = select_backend(first)
  File "C:\Users\davis\AppData\Roaming\Python\Python38\site-packages\zmq\backend\select.py", line 28, in select_backend
    mod = __import__(name, fromlist=public_api)
  File "C:\Users\davis\AppData\Roaming\Python\Python38\site-packages\zmq\backend\cython\__init__.py", line 6, in <module>
    from . import (constants, error, message, context,
ImportError: cannot import name 'constants' from partially initialized module 'zmq.backend.cython' (most likely due to a circular import) (C:\Users\davis\AppData\Roaming\Python\Python38\site-packages\zmq\backend\cython\__init__.py)

Failed to run jupyter as observable with args notebook --no-browser --notebook-dir=C:\Users\davis\AppData\Local\Temp\cda4e2c0-a341-4667-b662-1bd918e5238e --config=C:\Users\davis\AppData\Local\Temp\cda4e2c0-a341-4667-b662-1bd918e5238e\jupyter_notebook_config.py --NotebookApp.iopub_data_rate_limit=10000000000.0

Answer 1

当您尝试安装 package 时，VSCode 说您已将其安装在虚拟环境中。 这意味着您正在使用虚拟环境。 但是 Traceback 显示您使用的是 Romaing 文件夹下的 package，而不是项目下的虚拟环境。 您应该选择使用虚拟环境或使用全局环境并修复 package 问题。

如果选择全局环境，尝试重新安装或升级'zmq' package：

重新安装：“pip 卸载 pyzmq”->“pip 安装 pyzmq”。

升级：“pip install --upgrade pyzmq”或“pip install --upgrade pyzmq jupyterlab jupyter --force-reinstall”。

您可以参考zmq: Can not launch jupyter notebook了解更多信息。