How to install p7zip?
You can install p7zip in Kodi using the SuperRepo repository, the repository of the developer or by installing a single zip-file.
The easiest way is to install SuperRepo repositories, which contains over 2.200 Kodi addons for free.
About SuperRepo and p7zip
SuperRepo does not maintain p7zip. We only provide an automated index for Kodi users to have easy access to p7zip and other addons for Kodi. We are not affiliated with the developers (Stefan Saraev (seo at irc.freenode.net)) and do not provide help for this particular addon.