Linuxers shows you how to install the HP Printer plugin on Arch Linux

If you are installing a HP Printer on Arch Linux, and it is one that needs proprietary plugin, you may have problems while building that plugin.
This is because Arch Linux upgraded python from 2 to 3, so while you are running hp-setup or hp-plugin, if you see this error:
Verifying archive integrity... All good.

  HPLIP Syntax error invalid syntax