def predicates(self):
        if isinstance(self.function, ConstantExpression):
            function_preds = set([self.function.variable])
        else:
            function_preds = self.function.predicates()
        return function_preds | self.argument.predicates()
Return an existing participant based on session token.
dataset/ETHPy150Open nltk/nltk/nltk/sem/logic.py/ApplicationExpression.predicates--crossover with--dataset/ETHPy150Open gratipay/gratipay.com/gratipay/models/participant.py/Participant.from_session_token