This occurs due to the fact that enum.py treated enums as ints and enum34 treats them as the class. Happy to help resolve this one as this will be a step to making this package py3 compatible potentially.
Thanks for your work on this. A really great package.
With enum34 installed (due to other dependencies in a common environment) a KeyError is raised doing the _INDEX_FREQUENCY_FUNCION_DICT lookup.
This occurs due to the fact that enum.py treated enums as ints and enum34 treats them as the class. Happy to help resolve this one as this will be a step to making this package py3 compatible potentially.
Thanks for your work on this. A really great package.