debugging

        for p, d, fs in os.walk(dir):

            for i in fs:

                with open(os.path.join(p, i), encoding='utf-8') as i:

                    print('from file {} {} lines'.format(i, len(i.readlines()[1:])))

                    all_lines.extend(i.readlines()[1:])

        print('from {} file {} lines'.format(len(fs), len(all_lines)))

        with open(outfile, 'w', encoding='utf-8') as o_add:

            o_add.writelines(all_lines)

            for line in all_lines:

                o_add.write(line)

    df = pd.read_csv(outfile, names=['name','verb','arg','same','sent_id'])

    return df