The AR Format package is exposed to the SDK:
from Pro.Core import * from Pkg.AR import * def parseArArchive(fname): c = createContainerFromFile(fname) if c.isNull(): return obj = ARObject() if not obj.Load(c) or not obj.ParseArchive(): return entry = None while entry := obj.NextEntry(entry): print("Name:", entry.name) # retrieves the entry data as NTContainer c = obj.GetEntryData(entry)