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# The JupyterKernel GAP package
This package implements the [Jupyter](https:
//www.jupyter.org) protocol in GAP.
## Installation
**Note:
If you need
to reinstall this package, you will also need
to re-run
`pip3 install .`,
and re-add the Jupyter kernel
to your PATH**
### Dependencies
and installation
Download
and unpack the corresponding archive from the GAP website at
<https:
//www.gap-system.org/Releases/>
For Windows installations, it
is recommended
to utilise an installation
of
Windows Subsystem
for Linux (WSL)
as this makes the installation process
much more streamlined. JupyterKernel does
not require compilation,
but it depends on several other GAP packages,
of which several have
to be built
and require the following dependencies:
- libzmq3-dev
- m4
### Jupyter Setup
Jupyter can be installed using the following:
pip3 install notebook
in your terminal (
or for Windows, under WSL
's terminal). While other methods
do work
for installing python, this method has been tested
to work well
with
JupyterKernel.
Note that a Python version >=
3.
5 is required. Once that
is done, the GAP Jupyter
kernel must be registered
with Jupyter, by running the following command
in the `pkg/JupyterKernel` directory
of your GAP installation:
pip3 install .
or for your user only:
pip3 install . --user
### Adding JupyterKernel
to your PATH
If GAP
is not in your PATH,
then you have
to set the environment variable
`JUPYTER_GAP_EXECUTABLE`
to point
to your GAP executable
for Jupyter
to
be able
to execute GAP,
and the script `jupyter-kernel-gap` that
is
distributed
with this package
in the directory `bin/` needs
to be
in
your path.
This can be done through symlinking:
sudo ln -s <GAP-installation-directory>/gap gap
sudo ln -s <GAP-installation-directory>/pkg/JupyterKernel-X.Y.Z/bin/jupyter-kernel-ga
p
And an export command to set `JUPYTER_GAP_EXECUTABLE`:
export JUPYTER_GAP_EXECUTABLE=gap
### Running JupyterKernel
With all of the setup complete, you should be able to start Jupyter notebook with
jupyter notebook
and chose GAP as a kernel option.
### Troubleshooting
If you have registered the GAP Jupyter kernel, but it does not start, open GAP and enter
LoadPackage("JupyterKernel");
If this returns `fail`, follow the displayed instructions to attempt loading it second
time with a more verbose output in order to find out which of the dependencies fail to
load, and check their installation. If this returns `true` but it still does not work
in Jupyter, check that you have set the environment variable `JUPYTER_GAP_EXECUTABLE`
and the script `jupyter-kernel-gap` is in your path as described above. For some more
details, see <https://github.com/gap-packages/JupyterKernel/issues/74>.
## Documentation
Information and documentation can be found in the manual, available
as PDF `doc/manual.pdf` or as HTML `doc/chap0_mj.html`, or on the package
homepage at
<https://gap-packages.github.io/JupyterKernel/>
## Bug reports and feature requests
Please submit bug reports and feature requests via our GitHub issue tracker:
<https://github.com/gap-packages/JupyterKernel/issues>
# License
JupyterKernel is free software; you can redistribute it and/or modify it under
the terms of the BSD 3-clause license.
For details see the files COPYRIGHT.md and LICENSE.
# Acknowledgement
<table class="none">
<tr>
<td>
<img src="https://opendreamkit.org/public/logos/Flag_of_Europe.svg" width="128">
</td>
<td>
This infrastructure is part of a project that has received funding from the
European Union's Horizon 2020 research and innovation programme under grant
agreement No 676541.
</td>
</tr>
</table>