python - Jupyter Lab 和 Notebook 问题:内核错误
问题描述
似乎以某种方式删除了我的一个内核。也许这就是我收到此错误的原因。我怎么可能修复它?我可以重新安装一些东西(也许是基础环境中的内核)?
如果没有更好的选择,我会尝试完全重新安装 anaconda 作为最后的手段,根据:默认内核在 jupyter notebook (Python3) not working。
我尝试过使用以下内容:
- Jupyter Lab 的安装:
requirements already satisfied
- 运行“jupyter lab”时内核不显示
- UI 说“没有内核”,而我确实有一个
- 在 Python3 中运行 Jupyter Notebook 时出现内核错误
- https://ipython.readthedocs.io/en/latest/install/kernel_install.html
- https://medium.com/flatiron-engineering/recovering-from-a-jupyter-disaster-27401677aeeb
当前内核列表
jupyter kernelspec list
输出:
Available kernels:
python3 C:\Users\raysu\AppData\Roaming\jupyter\kernels\python3
vpython C:\ProgramData\jupyter\kernels\vpython
但是我必须有另一个与我的基本环境相关联的内核(我想它已经被删除了)。
C:\Users\raysu\Documents>conda env list
# conda environments:
#
base * C:\Program Files (x86)\Microsoft Visual Studio\Shared\Anaconda3_64
astra_env C:\Program Files (x86)\Microsoft Visual Studio\Shared\Anaconda3_64\envs\astra_env
bokeh_env C:\Program Files (x86)\Microsoft Visual Studio\Shared\Anaconda3_64\envs\bokeh_env
sound_env C:\Program Files (x86)\Microsoft Visual Studio\Shared\Anaconda3_64\envs\sound_env
tf_env C:\Program Files (x86)\Microsoft Visual Studio\Shared\Anaconda3_64\envs\tf_env
C:\Users\raysu\Anaconda3
C:\Users\raysu\Anaconda3\envs\pyforge
opencv_env C:\Users\raysu\AppData\Local\conda\conda\envs\opencv_env
test_env C:\Users\raysu\AppData\Local\conda\conda\envs\test_env
错误
Traceback (most recent call last):
File "C:\Program Files (x86)\Microsoft Visual Studio\Shared\Anaconda3_64\lib\site-packages\tornado\web.py", line 1699, in _execute
result = await result
File "C:\Program Files (x86)\Microsoft Visual Studio\Shared\Anaconda3_64\lib\site-packages\tornado\gen.py", line 742, in run
yielded = self.gen.throw(*exc_info) # type: ignore
File "C:\Program Files (x86)\Microsoft Visual Studio\Shared\Anaconda3_64\lib\site-packages\notebook\services\sessions\handlers.py", line 72, in post
type=mtype))
File "C:\Program Files (x86)\Microsoft Visual Studio\Shared\Anaconda3_64\lib\site-packages\tornado\gen.py", line 735, in run
value = future.result()
File "C:\Program Files (x86)\Microsoft Visual Studio\Shared\Anaconda3_64\lib\site-packages\tornado\gen.py", line 742, in run
yielded = self.gen.throw(*exc_info) # type: ignore
File "C:\Program Files (x86)\Microsoft Visual Studio\Shared\Anaconda3_64\lib\site-packages\notebook\services\sessions\sessionmanager.py", line 88, in create_session
kernel_id = yield self.start_kernel_for_session(session_id, path, name, type, kernel_name)
File "C:\Program Files (x86)\Microsoft Visual Studio\Shared\Anaconda3_64\lib\site-packages\tornado\gen.py", line 735, in run
value = future.result()
File "C:\Program Files (x86)\Microsoft Visual Studio\Shared\Anaconda3_64\lib\site-packages\tornado\gen.py", line 742, in run
yielded = self.gen.throw(*exc_info) # type: ignore
File "C:\Program Files (x86)\Microsoft Visual Studio\Shared\Anaconda3_64\lib\site-packages\notebook\services\sessions\sessionmanager.py", line 101, in start_kernel_for_session
self.kernel_manager.start_kernel(path=kernel_path, kernel_name=kernel_name)
File "C:\Program Files (x86)\Microsoft Visual Studio\Shared\Anaconda3_64\lib\site-packages\tornado\gen.py", line 735, in run
value = future.result()
File "C:\Program Files (x86)\Microsoft Visual Studio\Shared\Anaconda3_64\lib\site-packages\tornado\gen.py", line 209, in wrapper
yielded = next(result)
File "C:\Program Files (x86)\Microsoft Visual Studio\Shared\Anaconda3_64\lib\site-packages\notebook\services\kernels\kernelmanager.py", line 168, in start_kernel
super(MappingKernelManager, self).start_kernel(**kwargs)
File "C:\Users\raysu\AppData\Roaming\Python\Python36\site-packages\jupyter_client\multikernelmanager.py", line 110, in start_kernel
km.start_kernel(**kwargs)
File "C:\Users\raysu\AppData\Roaming\Python\Python36\site-packages\jupyter_client\manager.py", line 240, in start_kernel
self.write_connection_file()
File "C:\Users\raysu\AppData\Roaming\Python\Python36\site-packages\jupyter_client\connect.py", line 476, in write_connection_file
kernel_name=self.kernel_name
File "C:\Users\raysu\AppData\Roaming\Python\Python36\site-packages\jupyter_client\connect.py", line 141, in write_connection_file
with secure_write(fname) as f:
File "C:\Program Files (x86)\Microsoft Visual Studio\Shared\Anaconda3_64\lib\contextlib.py", line 81, in __enter__
return next(self.gen)
File "C:\Users\raysu\AppData\Roaming\Python\Python36\site-packages\jupyter_core\paths.py", line 404, in secure_write
win32_restrict_file_to_user(fname)
File "C:\Users\raysu\AppData\Roaming\Python\Python36\site-packages\jupyter_core\paths.py", line 359, in win32_restrict_file_to_user
import win32api
ImportError: DLL load failed: The specified procedure could not be found.
解决方案
通过在全新安装 Anaconda 后编辑相关的
kernelspec
:文件解决了该问题。kernel.json
详细解决方案
如前所述,我发现我有两个 kernelspecs
. (命令jupyter kernelspec list
:)
- 蟒蛇3:
C:\Users\raysu\AppData\Roaming\jupyter\kernels\python3
- 虚拟蟒蛇:
C:\ProgramData\jupyter\kernels\vpython
该文件维护kernelspec
了.json
jupyter-notebook/lab 启动某个内核的内核规范。幸运的是,内核vpython
运行正常,这帮助我缩小了内部问题的根源kernelpsec: python3
。我必须更正 python 可执行文件 ( python.exe
) 的路径,这解决了这个问题。
我想提一下,在这种情况下,以下两个资源派上了用场。在看到文档的典型结构后,我更清楚地知道问题出在哪里。kernelspec
注意:但是,由于我无法测试这个理论,我会问其他有类似问题的人,首先复制旧kernel.json
文件,然后更新python.exe
文件路径。如果这样可以解决内核错误,则可能不需要完全重新安装 Anaconda。
长话短说:
如果您的 jupyter notebook/lab 环境显示kernel error,则问题的根源很可能在 kernelspec 文件中:kernel.json
并且路径python.exe
不正确。kernel error
如果即使在重新安装 anaconda/jupyter-notebook/lab 后同样的情况仍然存在,这可能是一种更可能的情况。
例如,就我而言,python3-kernelspec
位于:
"C:\Users\raysu\AppData\Roaming\jupyter\kernels\python3"
并且python.exe
位于:
"C:\Users\raysu\Anaconda3\python.exe"
但是,python 可执行文件的路径是错误的:它仍然显示旧安装的路径。在 anaconda-reinstallation 之后,这条路径已经改变。kernel.json
所以,我不得不通过编辑文件来更新 python3 的 kernelspec 。
# kernel.json file
{
"argv": [
"C:\\Users\\raysu\\Anaconda3\\python.exe",
"-m",
"ipykernel_launcher",
"-f",
"{connection_file}"
],
"display_name": "Python 3",
"language": "python"
}
如果这不能解决您的问题,请查阅以下两个文档。因为这个,我浪费了 4 天。希望这个答案能在将来对某人有所帮助。
什么派上用场了?
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