AttributeError: 'HTMLParser' object has no attribute 'unescape'

[hernanmd]

After installing six manually, then I tried to run again

❯ python3 vtt2srt.py myFile.vtt myFile.srt
Traceback (most recent call last):
  File "vtt-to-srt-converter/vtt2srt.py", line 92, in <module>
    main()
  File "vtt-to-srt-converter/vtt2srt.py", line 88, in main
    convert_vtt_to_srt_v3(in_vtt, out_srt)
  File "vtt-to-srt-converter/vtt2srt.py", line 72, in convert_vtt_to_srt_v3
    html_unescape(clean_tags(cue_text))
  File "vtt-to-srt-converter/vtt2srt.py", line 25, in html_unescape
    return _ghp.unescape(s)
AttributeError: 'HTMLParser' object has no attribute 'unescape'