python - Jupyter notebook 死内核

Question

所以我尝试修复我的 Jupyter notebook(它不允许我导入库)，但是，我似乎让事情变得更糟了。现在每当我启动笔记本时，内核都会启动，然后立即死掉。我得到的错误如下:

[I 15:00:39.002 NotebookApp] Serving notebooks from local directory: /Users/stephanng/Documents/Coding/IPyNB
[I 15:00:39.002 NotebookApp] 0 active kernels 
[I 15:00:39.003 NotebookApp] The Jupyter Notebook is running at: http://localhost:8888/
[I 15:00:39.003 NotebookApp] Use Control-C to stop this server and shut down all kernels (twice to skip confirmation).
[W 15:00:43.558 NotebookApp] Notebook 157 Muon Analysis - Copy.ipynb is not trusted
[I 15:00:44.045 NotebookApp] Kernel started: 152a55a1-e393-4e86-b271-859b924e6a3e
/Users/stephanng/anaconda/envs/py27/bin/python: No module named _signatures; 'ipykernel' is a package and cannot be directly executed
[I 15:00:47.047 NotebookApp] KernelRestarter: restarting kernel (1/5)
/Users/stephanng/anaconda/envs/py27/bin/python: No module named _signatures; 'ipykernel' is a package and cannot be directly executed
[I 15:00:50.059 NotebookApp] KernelRestarter: restarting kernel (2/5)
/Users/stephanng/anaconda/envs/py27/bin/python: No module named _signatures; 'ipykernel' is a package and cannot be directly executed
[I 15:00:53.067 NotebookApp] KernelRestarter: restarting kernel (3/5)
/Users/stephanng/anaconda/envs/py27/bin/python: No module named _signatures; 'ipykernel' is a package and cannot be directly executed
[W 15:00:54.257 NotebookApp] Timeout waiting for kernel_info reply from 152a55a1-e393-4e86-b271-859b924e6a3e
[I 15:00:56.078 NotebookApp] KernelRestarter: restarting kernel (4/5)
WARNING:root:kernel 152a55a1-e393-4e86-b271-859b924e6a3e restarted
/Users/stephanng/anaconda/envs/py27/bin/python: No module named _signatures; 'ipykernel' is a package and cannot be directly executed
[W 15:00:59.094 NotebookApp] KernelRestarter: restart failed
[W 15:00:59.095 NotebookApp] Kernel 152a55a1-e393-4e86-b271-859b924e6a3e died, removing from map.
ERROR:root:kernel 152a55a1-e393-4e86-b271-859b924e6a3e restarted failed!
[W 15:00:59.116 NotebookApp] Kernel deleted before session
[W 15:00:59.117 NotebookApp] 410 DELETE /api/sessions/15eb80b6-d134-4142-96fa-1b1012be280c (::1) 5.42ms referer=http://localhost:8888/notebooks/157%20Muon%20Analysis%20-%20Copy.ipynb

有办法解决这个问题吗？还是我应该完全卸载并重新安装？另外，我该怎么做呢？当我执行 sudo pip uninstall jupyter 时，它似乎不起作用。

Answer 1

这是一个常见问题。

tl;dr:如果您需要，请在您的笔记本中执行此操作，例如 NumPy 的:

import sys
!conda install --yes --prefix {sys.prefix} numpy

请引用http://jakevdp.github.io/blog/2017/12/05/installing-python-packages-from-jupyter/详细讨论了为什么 Jupyter 环境中的“import foo”与命令行环境中的“import foo”不同。