无法使用 Jupyter Lab 或 Jupyter Notebook 运行任何 ipynb 文件（FileNotFoundError: [WinError 2] 系统找不到指定的文件）

Question

我在 Win10 上运行 JupyterLab/JupyterNotebook，在 Windows 10 上运行 Python 和 PyCharm。每当我启动 JupyterLab/JupyterNotebook 时，我都会收到以下错误消息。我尝试重新安装 Anaconda 分发版或任何其他 Python 实例，但每次启动 JupyterLab/Notebook 时都会出现相同的错误。我也尝试在带有 Win 7 的远程服务器上运行它，但它给了我完全相同的错误。我的一部分认为我在安装 Anaconda、Python 和 PyCharm 时犯了同样的错误，现在我无法将其恢复。有什么建议？

Traceback (most recent call last):
  File "E:\anaconda3\lib\site-packages\tornado\web.py", line 1543, in _execute
    result = yield result
  File "E:\anaconda3\lib\site-packages\tornado\gen.py", line 1099, in run
    value = future.result()
  File "E:\anaconda3\lib\site-packages\tornado\gen.py", line 1107, in run
    yielded = self.gen.throw(*exc_info)
  File "E:\anaconda3\lib\site-packages\notebook\services\sessions\handlers.py", line 73, in post
    type=mtype))
  File "E:\anaconda3\lib\site-packages\tornado\gen.py", line 1099, in run
    value = future.result()
  File "E:\anaconda3\lib\site-packages\tornado\gen.py", line 1107, in run
    yielded = self.gen.throw(*exc_info)
  File "E:\anaconda3\lib\site-packages\notebook\services\sessions\sessionmanager.py", line 79, in create_session
    kernel_id = yield self.start_kernel_for_session(session_id, path, name, type, kernel_name)
  File "E:\anaconda3\lib\site-packages\tornado\gen.py", line 1099, in run
    value = future.result()
  File "E:\anaconda3\lib\site-packages\tornado\gen.py", line 1107, in run
    yielded = self.gen.throw(*exc_info)
  File "E:\anaconda3\lib\site-packages\notebook\services\sessions\sessionmanager.py", line 92, in start_kernel_for_session
    self.kernel_manager.start_kernel(path=kernel_path, kernel_name=kernel_name)
  File "E:\anaconda3\lib\site-packages\tornado\gen.py", line 1099, in run
    value = future.result()
  File "E:\anaconda3\lib\site-packages\tornado\gen.py", line 315, in wrapper
    yielded = next(result)
  File "E:\anaconda3\lib\site-packages\notebook\services\kernels\kernelmanager.py", line 148, in start_kernel
    super(MappingKernelManager, self).start_kernel(**kwargs)
  File "E:\anaconda3\lib\site-packages\jupyter_client\multikernelmanager.py", line 110, in start_kernel
    km.start_kernel(**kwargs)
  File "E:\anaconda3\lib\site-packages\jupyter_client\manager.py", line 259, in start_kernel
    **kw)
  File "E:\anaconda3\lib\site-packages\jupyter_client\manager.py", line 204, in _launch_kernel
    return launch_kernel(kernel_cmd, **kw)
  File "E:\anaconda3\lib\site-packages\jupyter_client\launcher.py", line 128, in launch_kernel
    proc = Popen(cmd, **kwargs)
  File "E:\anaconda3\lib\subprocess.py", line 709, in __init__
    restore_signals, start_new_session)
  File "E:\anaconda3\lib\subprocess.py", line 997, in _execute_child
    startupinfo)
FileNotFoundError: [WinError 2] The system cannot find the file specified

Answer 1

这可能是因为您删除了一个 env 并且仍然存在对该 env 的引用。要解决此问题，请在命令提示符下运行以下命令：

python -m ipykernel install --user

希望这可以帮助 ：）

Answer 2

我遇到了完全相同的问题。我在这里找到了解决方案（请点击链接以获得进一步的解释），通过在我的虚拟环境中的 cmd 中输入这个问题解决了：

python -m ipykernel install --user

我希望它会有所帮助

Answer 3

看来和nb_conda有关系。当我使用下面的命令重新安装 nb_conda 后，它对我有用。

conda install nb_conda