def get_entity_properties(entity):
    return entity.properties().keys() + entity.dynamic_properties()
Make sure all input exists before continuing with our job.
dataset/ETHPy150Open moraes/tipfy/tipfy/appengine/db/__init__.py/get_entity_properties--crossover with--dataset/ETHPy150Open Yelp/mrjob/mrjob/hadoop.py/HadoopJobRunner._check_input_exists