export_current_pair_list.py

import metricsMachine as mm
import datetime
import time
import os

ts = time.time()
d = datetime.datetime.fromtimestamp(ts).strftime('%Y-%m%d-%H%M%S')
f = mm.CurrentFont()

path = f.path.replace(os.path.splitext(f.path)[-1], f"-kern_{d}.fea")
subs = False

skip = f.lib.get("public.skipExportGlyphs", ())
pl = mm.GetPairList(f)
s = set()
for l,r in pl:
    s.add(l)
    s.add(r)
s = list(s)
ig = [g.name for g in f if g.name not in s or g.name in skip]
f.lib["public.skipExportGlyphs"] = ig
text = f.kerning.exportFeatureText(path,subs)
f.lib["public.skipExportGlyphs"] = skip