def assert_raises(excClass, callableObj=None, *args, **kwargs):
    pass
Normalizes and type checks that the given argument is a valid key or keys.
dataset/ETHPy150Open JetBrains/python-skeletons/nose/tools/__init__.py/assert_raises--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/api/datastore.py/NormalizeAndTypeCheckKeys