def get_block(connection, block_id):
    """Get a block from the bigchain table.

    Args:
        block_id (str): block id of the block to get

    Returns:
        block (dict): the block or `None`
    """

    raise NotImplementedError
Get a block from the bigchain table.

Args:
block_id (str): block id of the block to get

Returns:
block (dict): the block or `None`
bigchaindb/backend/query.py