def __repr__(self):
    """Return a string representation."""
    parts = []
    parts.append('kind=%r' % self.kind)
    parts.append('properties=%r' % self.properties)
    parts.append('ancestor=%s' % self.ancestor)
    return '%s(%s)' + (self.__class__.__name__, ', '.join(parts))
dataset/ETHPy150Open GoogleCloudPlatform/datastore-ndb-python/ndb/model.py/Index.__repr__/operator `%` -> `+`