gf_kernel is a Jupyter kernel for the Grammatical Framework (GF) . It allows you to write grammars and using them for parsing/translating/... all in one notebook, which makes it great for demos and teaching, but also for small experiments with GF.

This package requires Python 3 (or newer) and this README assumes that this is the default python version. If in doubt, use python3 instead of python and python3 -m pip instead of pip.

Additionally, setuptools is required to install this package. This likely came with your Python distribution, but in case it did not use pip install setuptools to install it.

If you haven't installed GF already, get it from the official download website.

For graph visualization GF uses Graphviz. Under Ubuntu etc. you can install it with

sudo apt install graphviz

or under Mac OS X with homebrew:

brew install graphviz

You can either install the kernel from the source repository:

git clone https://github.com/kwarc/gf_kernel
cd gf_kernel
pip install .

or install it directly from pip:

pip install gf-kernel

Afterwards, install the kernel module with:

python -m gf_kernel.install

You're now ready to go and can start a Jupyter notebook with:

jupyter notebook

Select the gf_kernel as kernel in your notebook. The kernel supports all of the GF shell commands. Output files produced by these commands will be placed into the current directory.

The kernel can also be used to define new grammars, which are immediately imported for usage upon defining. If you would like to have line numbers for editing your code you can use the Juypter shortcut Esc+L to enable them.

In addition to the GF shell commands the kernel supports the following commands:

• view : show the graph(s) generated by the specified GF shell command
• help : shows the help message
• export : saves the specified grammar in the current diretory
• clean : removes all .dot, .png and .gfo files from the current directory

Here you can see a short example of how the kernel can be used. The full tutorial is available here.