def get_value(self, key):
        val = self[key]
        if isinstance(val, FeatureStructure):
            raise ValueError('Value for key %r is a FeatureStructure' % key)
        return val
Returns the value corresponding to key but throws a ValueError if it is a FeatureStructure
dataset/ETHPy150Open cidles/graf-python/src/graf/annotations.py/FeatureStructure.get_value