observation_period_end was a bit of a stumbling block for me until I read the BetaGeoFitter definition. This check would have saved me from a confusion div by 0 error in _scale_time
observation_period_end was a bit of a stumbling block for me until I read the BetaGeoFitter definition. This check would have saved me from a confusion div by 0 error in _scale_time

CamDavidsonPilon/lifetimes