How to install pytz?
pytz 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 pytz
SuperRepo does not maintain pytz. We only provide an automated index for Kodi users to have easy access to pytz and other addons for Kodi. We are not affiliated with the developers (Stuart Bishop, Paul Backhouse) and do not provide help for this particular addon.