This is the Python implementation of the algorithms cited in:
Ciampi, A., Lechevallier, Y., Castejón-Limas, M., González-Marcos, A. Hierarchical clustering of subpopulations with a dissimilarity based on the likelihood ratio statistic: application to clustering massive data sets. Pattern Anal Applic 11, 199–220 (2008). https://doi.org/10.1007/s10044-007-0088-4