in ru_RU/pythonpath/lightproof_impl_ru_RU.py [0:0]
def onlymorph(st):
if st != None:
st = re.sub(r"^.*(st:|po:)", r"\\1", st) # keep last word part
st = re.sub(r"\\b(?=[dit][sp]:)","@", st) # and its affixes
st = re.sub(r"(?<!@)\\b\w\w:\w+","", st).replace('@','').strip()
return st