gistfile1.txt

Run like this: $ python ~/tmp/foo.py '(a(s(taya{sv}))a{sv})' /srv/rhel-atomic-host/repo/summary

#!/usr/bin/env python

import os,sys
from gi.repository import GLib

typestr = GLib.VariantType.new(sys.argv[1])
data = open(sys.argv[2]).read()
bytedata = GLib.Bytes.new(data)
d = GLib.Variant.new_from_bytes(typestr, bytedata, False)
print d