No module named ipykernel_launcher

[keddad]

Kernel keeps dying, and reinstalling as in #1558 doesn't help.

[I 22:20:12.018 NotebookApp] Serving notebooks from local directory: /home/keddad
[I 22:20:12.018 NotebookApp] 0 active kernels 
[I 22:20:12.018 NotebookApp] The Jupyter Notebook is running at: http://localhost:8888/
[I 22:20:12.018 NotebookApp] Use Control-C to stop this server and shut down all kernels (twice to skip confirmation).
[W 22:20:12.585 NotebookApp] /home/keddad/.steampath doesn't exist
[W 22:20:12.587 NotebookApp] /home/keddad/pip doesn't exist
[W 22:20:14.891 NotebookApp] 404 GET /nbextensions/widgets/notebook/js/extension.js?v=20181117222011 (::1) 9.21ms referer=http://localhost:8888/notebooks/Project.ipynb
[I 22:20:15.256 NotebookApp] Kernel started: e33b431f-ed0b-4b81-ae69-f2cbe1ede3ad
/usr/bin/python: No module named ipykernel_launcher
[I 22:20:18.258 NotebookApp] KernelRestarter: restarting kernel (1/5)
/usr/bin/python: No module named ipykernel_launcher
[I 22:20:21.267 NotebookApp] KernelRestarter: restarting kernel (2/5)
/usr/bin/python: No module named ipykernel_launcher
[I 22:20:24.278 NotebookApp] KernelRestarter: restarting kernel (3/5)
/usr/bin/python: No module named ipykernel_launcher
[W 22:20:25.306 NotebookApp] Timeout waiting for kernel_info reply from e33b431f-ed0b-4b81-ae69-f2cbe1ede3ad
[I 22:20:27.283 NotebookApp] KernelRestarter: restarting kernel (4/5)
WARNING:root:kernel e33b431f-ed0b-4b81-ae69-f2cbe1ede3ad restarted
/usr/bin/python: No module named ipykernel_launcher
[W 22:20:30.291 NotebookApp] KernelRestarter: restart failed
[W 22:20:30.292 NotebookApp] Kernel e33b431f-ed0b-4b81-ae69-f2cbe1ede3ad died, removing from map.
ERROR:root:kernel e33b431f-ed0b-4b81-ae69-f2cbe1ede3ad restarted failed!
[W 22:20:30.334 NotebookApp] Kernel deleted before session
[W 22:20:30.335 NotebookApp] 410 DELETE /api/sessions/8421fb6b-5388-4daa-b715-d8aae11bbc1c (::1) 1.49ms referer=http://localhost:8888/notebooks/Project.ipynb

Any ideas of fixing it?

[keddad]

Solved problem by switching to Windows

[martinosorb]

I'm having the same problem. Not sure why this has been closed.

[martinosorb]

Never mind, solution is in #1558: just install ipykernel. The reason why this suddenly happened to my perfectly working installation is unclear.