@classmethod
    def get(cls, expression):
        executor = Executor(cls.database)
        result = executor.execute(expression)
        if len(result) != 1:
            raise ValueError('Got %s results, expected 1.' % len(result))
        return cls.load(result._first_or_any(), convert_key=False)
Returns a boolean indicating whether there is a value coming in on
dataset/ETHPy150Open coleifer/walrus/walrus/models.py/Model.get--crossover with--dataset/ETHPy150Open VisTrails/VisTrails/vistrails/core/modules/vistrails_module.py/Module.has_input