need to install python, zeal (https://zealdocs.org/) and some docsets for zeal.
The path to zeal's dossets path:
{
"path": "D:\\Program Files\\Zeal\\dossets"
}z ~help
z ~set py3=python3
z ~del py3
z ~list
Colon and the following query string can be blank.
z py3: sys.v
z py3:sys.v
z py2,py3:sys.v
z rust,c:print
z rust:alloc:
z rust:alloc::
z rust:alloc::fmt