def assert_is_instance(obj, cls, msg=None):
        pass
A function that calculates the modified Dunning log-likelihood
dataset/ETHPy150Open JetBrains/python-skeletons/nose/tools/__init__.py/assert_is_instance--crossover with--dataset/ETHPy150Open nltk/nltk/nltk/tokenize/punkt.py/PunktTrainer._dunning_log_likelihood