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）

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，都会收到下面所述的错误。我尝试重新安装 Anaconda-distribution 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。我还尝试在 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。有什么建议么？

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

这可能是因为您删除了一个环境，但仍然存在对该环境的引用。要解决该问题，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 ：）