Как добавить ключевые слова к данным IPTC в формате JPG?

Вместо добавления используйте равный "="

from iptcinfo3 import IPTCInfo

info = IPTCInfo('Gus.jpg')
print(info['keywords'])

# add keyword
info['keywords'] = ['new keyword']

info.save()
info.save_as('Gus_2.jpg')

У меня та же ошибка. Кажется, проблема с сохранением зависит от файла.

from iptcinfo3 import IPTCInfo
info = IPTCInfo('image.jpg', force=True)
info.save()

Что дает мне ту же ошибку.

WARNING: problems with charset recognition (b'\x1b')
WARNING: problems with charset recognition (b'\x1b')
Traceback (most recent call last):
  File "./searchimages.py", line 123, in <module>
    main(sys.argv[1:])
  File "./searchimages.py", line 119, in main
    find_photos(str(sys.argv[1]))
  File "./searchimages.py", line 46, in find_photos
    write_keywords(image, current_keywords, new_keywords)
  File "./searchimages.py", line 109, in write_keywords
    info.save_as('out.jpg')
  File "/usr/local/lib/python3.7/site-packages/iptcinfo3.py", line 635, in save_as
    jpeg_parts = jpeg_collect_file_parts(fh)
  File "/usr/local/lib/python3.7/site-packages/iptcinfo3.py", line 324, in jpeg_collect_file_parts
    adobeParts = collect_adobe_parts(partdata)
  File "/usr/local/lib/python3.7/site-packages/iptcinfo3.py", line 433, in collect_adobe_parts
    out = [''.join(out)]
TypeError: sequence item 0: expected str instance, bytes found