calling jupyter notebook outputs error

[jshin49]

calling

jupyter notebook --NotebookApp.kernel_spec_manager_class='environment_kernels.EnvironmentKernelSpecManager'

causes this error:

[C 15:15:03.610 NotebookApp] Bad config encountered during initialization:
[C 15:15:03.610 NotebookApp] The 'kernel_spec_manager_class' trait of <notebook.notebookapp.NotebookApp object at 0x10314af90> instance must be a type, but u'environment_kernels.EnvironmentKernelSpecManager' could not be imported

How should I deal with this issue?

[Cadair]

'environment_kernels.EnvironmentKernelSpecManager' could not be imported

It appears from this line that there is something wrong with your install, are you sure you have this pacakge and your notebook server installed in the same env?

[Avik1993]

I am facing the same error. Any way to rectify this?

[driesbuyck]

I have the same problem. Is this plugin working in python 3.6 environments and jupyter notebook 5.0.0?

import environment_kernels
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<removed>/.conda/envs/myenv/lib/python3.6/site-packages/environment_kernels/__init__.py", line 2, in <module>
    from .core import *
  File "<removed>/.conda/envs/myenv/lib/python3.6/site-packages/environment_kernels/core.py", line 7, in <module>
    from jupyter_client.kernelspec import (KernelSpecManager, NoSuchKernel)
ModuleNotFoundError: No module named 'jupyter_client'

-> After installing module jupyter_client, I can now import it

Python 3.6.3 |Anaconda, Inc.| (default, Nov 20 2017, 20:41:42) 
[GCC 7.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import environment_kernels
>>> 

But I still get the error when starting jupyter notebook

[C 09:34:59.388 NotebookApp] Bad config encountered during initialization:
[C 09:34:59.388 NotebookApp] The 'kernel_spec_manager_class' trait of <notebook.notebookapp.NotebookApp object at 0x7f800ac52c18> instance must be a type, but 'environment_kernels.EnvironmentKernelSpecManager' could not be imported

[driesbuyck]

got this fixed by installing juypiter notebook inside the new conda environment (conda install jupyter)

[Cadair]

You will have to have environment_kernels installed in the Python env (conda, virtualenv or system) where you are running the jupyter notebook command. Is that what you are saying you fixed, or are you having startup issues if you don't have jupyter installed in all your envs?

[driesbuyck]

Yes, I had environment_kernels installed in a conda environment, but the jupyter notebook I seemed to be starting it from the system. So after installing jupyter notebook inside the conda env, it was fixed.
(I could probably also have installed environment_kernels in system env to get rid of the issue, but it's cleaner inside the conda environment)

[Cadair]

maybe this needs to be a little better documented (much like the whole project), but the solution to this, as you have found, is to have both the notebook server and environment_kernels installed in the same path.

[Darshil020]

i tried installing jupyter notebook inside my environment. it is still not working.

[buddhashrestha]

You need to install environment_kernels using :
pip install environment_kernels

[xiaoleitw]

facing the same question.

[nocibambi]

Same issue. I cannot run jupyter notebook from the system (but it works from another environment).

Here, someone solved by editing the config, but did not specify which one.

[nocibambi]

Same issue. I cannot run jupyter notebook from the system (but it works from another environment).

Here, someone solved by editing the config, but did not specify which one.

Ok, so I solved it finally, here are the steps:

1. In terminal, find the configurations directories with jupyter --paths.
2. In one of the directories there I found jupyter_notebook_config.json
3. Save a back up copy ;)
4. From the file delete the following line:

"kernel_spec_manager_class": "nb_conda_kernels.CondaKernelSpecManager" 

5. Delete the comma preceding it. (Duh, I know...)

[InsciteAnalytics]

@nocibambi
My friend, I owe you my sanity ;)
Thanks so much!

[lstamaria]

@nocibambi
This actually works. Amazing. Thank you!

[Djeutsch]

Same issue. I cannot run jupyter notebook from the system (but it works from another environment).
Here, someone solved by editing the config, but did not specify which one.

Ok, so I solved it finally, here are the steps:

1. In terminal, find the configurations directories with jupyter --paths.
2. In one of the directories there I found jupyter_notebook_config.json
3. Save a back up copy ;)
4. From the file delete the following line:

"kernel_spec_manager_class": "nb_conda_kernels.CondaKernelSpecManager" 

1. Delete the comma preceding it. (Duh, I know...)

Many thanks for this.

[PursuitYP]

@nocibambi It really works! Thank you very much!

[andreisharshov]

@nocibambi Thank you very much!:)

[ghost]

my jupyter_notebook_config.json file was in /opt/conda/envs/beakerx/etc/jupyter

[sykim862]

@Djeutsch Thank you very much ㅠㅠㅠㅠㅠㅠㅠㅠㅠㅠㅠㅠㅠㅠㅠ

[jamesmuniu]

Thank you!!

[andrewssdd]

For error that cannot import

nb_conda_kernels.CondaKernelSpecManager

It was because nb_conda_kernels cannot be imported. That can happy when you change environment that calls juypter notebook.

conda install nb_conda_kernels resolves the problem.

[coolkate3738]

@nocibambi you are a real hero!! Big love <3

[minying1999]

Same issue. I cannot run jupyter notebook from the system (but it works from another environment).
Here, someone solved by editing the config, but did not specify which one.

Ok, so I solved it finally, here are the steps:

1. In terminal, find the configurations directories with jupyter --paths.
2. In one of the directories there I found jupyter_notebook_config.json
3. Save a back up copy ;)
4. From the file delete the following line:

"kernel_spec_manager_class": "nb_conda_kernels.CondaKernelSpecManager" 

1. Delete the comma preceding it. (Duh, I know...)

Thank you very much, you are such a hero!

[sreedharu]

Same issue. I cannot run jupyter notebook from the system (but it works from another environment).
Here, someone solved by editing the config, but did not specify which one.

Ok, so I solved it finally, here are the steps:

1. In terminal, find the configurations directories with jupyter --paths.
2. In one of the directories there I found jupyter_notebook_config.json
3. Save a back up copy ;)
4. From the file delete the following line:

"kernel_spec_manager_class": "nb_conda_kernels.CondaKernelSpecManager" 

1. Delete the comma preceding it. (Duh, I know...)

Thank you

[scott-n58]

this issue seems to be a problem with nb extensions becoming corrupted.
https://docs.anaconda.com/anaconda/user-guide/tasks/use-jupyter-notebook-extensions/
reviewing this setting after following the deletion step from above I did get
a notebook session successfully started. of course - w/o my envs.
to resolve this i found the link above & in an open notebook cell:
conda install nb_conda
after this was completed (w/o any hiccups) i checked that *_config.json file
& sure enough:
in this jupyter_notebook_config.json was the new extension seek line
with nb_conda set to true.

{
"NotebookApp": {
"nbserver_extensions": {
"nb_conda": true
},
"kernel_spec_manager_class': "nb_conda_kernels.CondaKernelSpecManager"
}

closing with a restart - the new session displayed all of my envs & available for selection.

[Larry-u]

this issue seems to be a problem with nb extensions becoming corrupted.
https://docs.anaconda.com/anaconda/user-guide/tasks/use-jupyter-notebook-extensions/
reviewing this setting after following the deletion step from above I did get
a notebook session successfully started. of course - w/o my envs.
to resolve this i found the link above & in an open notebook cell:
conda install nb_conda
after this was completed (w/o any hiccups) i checked that *_config.json file
& sure enough:
in this jupyter_notebook_config.json was the new extension seek line
with nb_conda set to true.

{
"NotebookApp": {
"nbserver_extensions": {
"nb_conda": true
},
"kernel_spec_manager_class': "nb_conda_kernels.CondaKernelSpecManager"
}

closing with a restart - the new session displayed all of my envs & available for selection.

The analysis from this bro is correct, if u just delete

"kernel_spec_manager_class': "nb_conda_kernels.CondaKernelSpecManager"

from jupyter_config.json, the error is gone but u cannot see envs in jupyter starter page.

The correct way is delete that line in jupyter_config.json, and append it to jupyter_notebook_config.json (in the same dir), as the this quote displayed.

[KonWys01]

If someone has this issue in case of ArcGIS Pro, then removing "kernel_spec_manager_class': "nb_conda_kernels.CondaKernelSpecManager" from jupyter_config.json solves the issue (in default environment -C:\Program Files\ArcGIS\Pro\bin\Python\envs\arcgispro-py3\etc\jupyter.

If you are not allowed to do it - grand yourself all roles in properties -> security -> users. You need administrator account to do it

[mugsiemx]

SOLVED!! THANK YOU so very much!! my path is; C:\Users<username>\anaconda3\etc\jupyter\jupyter_notebook_config.json. Once deleting the "kernel_spec_manager_class': "nb_conda_kernels.CondaKernelSpecManager" line from the file, my jupter notebook fired up quickly!! I AM SO GRATEFUL!!