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en:services:application_services:jupyter:start [2023/03/30 16:05] – [Installation of additional packages and environments via Conda] bwegman1en:services:application_services:jupyter:start [2023/03/30 16:22] – [Notebook fails to start after package installation or kernel connection failure] bwegman1
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 mv -v .local/ .local.gwdg-disable mv -v .local/ .local.gwdg-disable
 </code> </code>
 +
 <WRAP tip> <WRAP tip>
 **mamba** is an alternative implementation of the **conda** package manager. They are interchangeable, it's use is recommended. **mamba** is an alternative implementation of the **conda** package manager. They are interchangeable, it's use is recommended.
 +https://github.com/mamba-org/mamba
 </WRAP> </WRAP>
  
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 Creating and activating the environment: Creating and activating the environment:
 <code bash> <code bash>
-conda create -y --prefix ./wikidoku +mamba create -y --prefix ./wikidoku 
-conda activate ./wikidoku+mamba activate ./wikidoku
 </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. 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>
-conda install -y jinja2+mamba install -y jinja2
 </code> </code>
  
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 python3 -m ipykernel install --user --name wikidoku --display-name "Python (wikidoku)" python3 -m ipykernel install --user --name wikidoku --display-name "Python (wikidoku)"
 jupyter kernelspec list jupyter kernelspec list
-conda deactivate+mamba deactivate
 </code> </code>
  
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 Via ''New ->'' a new notebook with the new environment can be started. In existing notebooks the kernel can be changed after starting the notebook and selecting ''Kernel -> Change Kernel''. Via ''New ->'' a new notebook with the new environment can be started. In existing notebooks the kernel can be changed after starting the notebook and selecting ''Kernel -> Change Kernel''.
  
-=== Installing additional kernels in an Conda environment ===+=== Installing additional kernels in an Conda/Mamba environment ===
  
 Installing a new, independent Python kernel für the current environment is possible. As an example an older Python 2.7 kernel will be installed next. Installing a new, independent Python kernel für the current environment is possible. As an example an older Python 2.7 kernel will be installed next.
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 Next follows the installation of the kernel, the ''jupyter'' module for that kernel and finally the kernel is made available for selection in the kernel list. Next follows the installation of the kernel, the ''jupyter'' module for that kernel and finally the kernel is made available for selection in the kernel list.
 <code bash> <code bash>
-conda install -y python=2.7+mamba install -y python=2.7
 python3 -m pip install jupyter python3 -m pip install jupyter
 python3 -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)"