Installation

To register a Jupyter kernel, run a concrete install command such as:

fish-kernel add --user

If you want to install into the current Python environment instead, use:

fish-kernel add --sys-prefix

fish-kernel install is an alias of fish-kernel add, so either name works.

Install from PyPI

pip install fish-kernel

Install from conda-forge

Install from the conda-forge channel with conda, mamba, or pixi:

conda install -c conda-forge fish-kernel

mamba install -c conda-forge fish-kernel

pixi add fish-kernel

Register kernelspec

fish-kernel add requires exactly one target option.

User scope

fish-kernel add --user

Installs into your user Jupyter directory.

Environment scope

fish-kernel add --sys-prefix

Installs into the current sys.prefix environment.

Custom scope

fish-kernel add --prefix /path/to/prefix

Installs into a custom prefix.

Verify installation

jupyter kernelspec list

Confirm that fish exists in the list.

Remove kernelspec

To unregister the kernelspec, run:

fish-kernel remove

fish-kernel uninstall is an alias of fish-kernel remove.

Unlike add, a target option is optional. With no options, remove deletes whichever installed copy it finds first. If you installed the kernel into more than one scope (for example both --user and --sys-prefix), pass the matching option to target a specific one:

fish-kernel remove --user
fish-kernel remove --sys-prefix
fish-kernel remove --prefix /path/to/prefix