def find_scenario_string_from_number(scenario):
    """
    Find a string to represent a scenario from it's number (or None in the case of baseline).

    Args:
        scenario: The scenario value or None for baseline
    Returns:
        The string representing the scenario
    """

    if scenario == 0:
        return 'baseline'
    elif scenario == 16:
        return 'no transmission'
    else:
        return 'scenario_' + str(scenario)