How to install html5lib-python?
html5lib-python is available in the official Kodi repository which is included by default in Kodi. You can install this addon by going in Kodi to System >> Settings >> Addons >> Get Addons >> XBMC.org Addons or Kodi.tv Addons
About SuperRepo and html5lib-python
SuperRepo does not maintain html5lib-python. We only provide an automated index for Kodi users to have easy access to html5lib-python and other addons for Kodi. We are not affiliated with the developers (html5lib) and do not provide help for this particular addon.