#!/usr/bin/env python
import fontforge as ff
import sys

args = sys.argv[1:]

if args[0] == '--help':
    print("changeFontFamily <font> <family> <newFont>")
else:
    font = args[0]
    family = args[1]
    newfont = args[2]
    f = ff.open( args[0] )
    f.familyname = family
    f.generate(newfont)
