def free(self):
        return self.term.free() - set([self.variable])
Return a weak reference to arg if possible, or arg itself if not.
dataset/ETHPy150Open nltk/nltk/nltk/sem/logic.py/VariableBinderExpression.free--crossover with--dataset/ETHPy150Open CiscoSystems/avos/horizon/utils/memoized.py/_try_weakref