file_io.py

def recurse_map_file_paths(input_dirs=None):
    """ Recursively maps an input directory """
    if not type(input_dirs) is list:
        input_dirs = [input_dirs]

    file_paths = list()
    for d in input_dirs:
        for root, folder, filenames in os.walk(d):
            for f in filenames:
                if f.lower().endswith(cfg.file_types):
                    fpath = os.path.join(root, f).replace('\\', '/').strip()
                    fpath = normalize_filepath(fpath)

                    if not fpath in file_paths:
                        file_paths.append(fpath)
    return file_paths