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en:services:application_services:jupyter:start [2019/10/07 15:24]
bwegman1 [Notebook fails to start after package installation or update, error 500]
en:services:application_services:jupyter:start [2019/10/08 14:22] (current)
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 </​code>​ </​code>​
-Next the new environment will be registered with the notebook. Terms for ''​--name'' ​and ''​--display-name''​ can be chosen freely, ​the later being shown in the kernel selection of the notebook. The second command lists all known environments.+As an example ​the package ​''​jinja2'' ​will be installed next. This is the step to install ​the desired software packages from various Conda channels.
 <code bash> <code bash>
-python -m ipykernel ​install --user --name wikidoku --display-name "​Python (wikidoku)"​ +conda install -y jinja2
-jupyter kernelspec list+
 </​code>​ </​code>​
-If installation of the kernel fails with the message ​''​/​usr/​bin/​python:​ No module named ipykernel'' ​the additional package ​''​jupyter'' ​needs to be installed and installation of the kernel ​repeated:+Next the new environment will be registered ​with the notebook. Terms for ''​--name'' ​and ''​--display-name'' ​(optional) can be chosen freely, the later being shown in the kernel ​selection of the notebook. The second command lists all known environments. ​ The last command exists the environment.
 <code bash> <code bash>
-python ​-m pip install jupyter+python3 ​-m ipykernel ​install ​--user --name wikidoku --display-name "​Python (wikidoku)"​ 
 +jupyter ​kernelspec list 
 +conda deactivate
 </​code>​ </​code>​
-As an example ​the package ''​jinja2'' ​will be installed ​next. This is the step to install the desired software packages from various Conda channels. The last command exists ​the environment.+If installation of the kernel fails with the message ''/​usr/​bin/​python:​ No module named ipykernel''​ the additional ​package ''​jupyter'' ​needs to be installed ​and installation of the kernel repeated:
 <code bash> <code bash>
-conda install ​-y jinja2 +python3 ​-m pip install jupyter
-conda deactivate+
 </​code>​ </​code>​
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 <code bash> <code bash>
 conda install -y python=2.7 conda install -y python=2.7
-python ​-m pip install jupyter +python3 ​-m pip install jupyter 
-python ​-m ipykernel install --user --name oldpython --display-name "​Python 2.7 (oldpython)"​+python3 ​-m ipykernel install --user --name oldpython --display-name "​Python 2.7 (oldpython)"​
 </​code>​ </​code>​
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 import sys import sys
 print (sys.version) print (sys.version)
 +=== Removing an environment ===
 +In order to remove an environment it has to be de-registered from the notebook server and then its files removed (optional but recommended). We list the installed kernels, de-register and remove the environment'​s files:
 +<code bash>
 +jupyter kernelspec list
 +jupyter kernelspec remove wikidoku
 +rm -rf ./wikidoku
 </​code>​ </​code>​