def __init__(self, client_key, output="json"):
        HttpApiClient.__init__(self, client_key, output=output)
:see: Expression.constants()
dataset/ETHPy150Open adamhadani/python-yelp/yelp/api.py/ReviewSearchApi.__init__--crossover with--dataset/ETHPy150Open nltk/nltk/nltk/sem/logic.py/ApplicationExpression.constants