1431                                          tx.handle, resp)

  1431                                          tx.handle, resp)

  1432         except apiproxy_errors.ApplicationError, err:

  1432         except apiproxy_errors.ApplicationError, err:

  1433           if (err.application_error ==

  1433           if (err.application_error ==

  1434               datastore_pb.Error.CONCURRENT_TRANSACTION):

  1434               datastore_pb.Error.CONCURRENT_TRANSACTION):

  1435             logging.warning('Transaction collision for entity group with '

  1435             logging.warning('Transaction collision for entity group with '

  1437             tx.handle = None

  1437             tx.handle = None

  1438             tx.entity_group = None

  1438             tx.entity_group = None

  1439             continue

  1439             continue

  1440           else:

  1440           else:

  1441             raise _ToDatastoreError(err)

  1441             raise _ToDatastoreError(err)