PyBDEI source code and data corresponding to the version described in A Zhukova, F Hecht, Y Maday, and O Gascuel. Fast and Accurate Maximum-Likelihood Estimation of Multi-Type Birth-Death Epidemiological Models from Phylogenetic Trees medRxiv 2022 doi:10.1101/2022.08.02.22278328 (version posted on July 6, 2023)