

def _is_initialized(self, entity):
    'Internal helper to ask if the entity has a value for this Property.\n\n    This returns False if a value is stored but it is None.\n    '
    return ((not self._required) or ((self._has_value(entity) or (self._default is not None)) and (self._get_value(entity) is not None)))

dataset/ETHPy150Open GoogleCloudPlatform/datastore-ndb-python/ndb/model.py Property._is_initialized/original