To install dequa_graph you need graph-tool (version 2.37).
If you are installing dequa-graph together with dequa there should be no problems, otherwise you first need to have graph-tool and pkg-config already installed. The easiest way is to create a conda environment
conda create -n dequagraph python=3.9 graph-tool=2.37 pkg-config
Then you can pip install dequa_graph:
pip install git+https://github.com/De-Qua/dequa-graph.git
or from source after cloning the repository, from the main directory
pip install .
or if you are developing and you want to see changes in the code
pip install -e .