def check_clip_len(options, duration):
    """
    Function to determine the number of clips of a specified duration.

    Parameters
    ----------
    options : list of 2-item tuples or lists
        start and stop times to evaluate

    duration : numeric (int or float)
        minimum desired clip duration

    Returns
    -------
    remaining_options : list of 2-item tuples or lists or empty list
        start and stop times that are at least sepcified duration, or an empty
        list if no given clips are sufficiently long
    """
    remaining_options = []
    for pair in options:
        if ((pair[1] - pair[0]) > duration):
            remaining_options.append(pair)
            print(''.join(["Here's an option: ", str(pair[0]), ":", str(pair[
                  1])]))
    return remaining_options