def get_transaction(connection, transaction_id):
    """Get a transaction from the transactions table.

    Args:
        transaction_id (str): the id of the transaction.

    Returns:
        The result of the operation.
    """

    raise NotImplementedError
Get a transaction from the transactions table.

Args:
transaction_id (str): the id of the transaction.

Returns:
The result of the operation.
bigchaindb/backend/query.py