def titleize(filename_list, all_or_caps_or_spaces):

    titleized_list = []

    #for filename in os.listdir(path):
    for filename in filename_list:
        titleized = filename.title()
        if os.path.isdir(filename) or filename == titleized:
            titleized_list.append(titleized)
            continue
        else:
            titleized_list.append(titleized)

    return(titleized_list)