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def delete(self, condition=None)->MutationResult:
    """
    Delete entities by primary keys.
    Example: client.delete("_id in [1,10,100]")
    
    :param condition: an expression indicates whether an entity should be deleted
    :type  condition: str
    """

def delete(self, collection_name, expr, partition_name=None, timeout=None, **kwargs):
    """
    Delete entities with an expression condition.
    And return results to show which primary key is deleted successfully

    :param collection_name: Name of the collection to delete entities from
    :type  collection_name: str

    :param expr: The query expression
    :type  expr: str

    :param partition_name: Name of partitions that contain entities
    :type  partition_name: str

    :param timeout: An optional duration of time in seconds to allow for the RPC. When timeout
                    is set to None, client waits until server response or error occur
    :type  timeout: float

    :return: list of ids of the deleted vectors.
    :rtype: list

    :raises:
        RpcError: If gRPC encounter an error
        ParamError: If parameters are invalid
        BaseException: If the return result from server is not ok
    """