def checkRecursion( self, parseElementList ):
        if parseElementList in self:
            raise RecursiveGrammarException( parseElementList+[self] )
        subRecCheckList = parseElementList[:] + [ self ]
        if self.expr is not None:
            self.expr.checkRecursion( subRecCheckList )
dataset/ETHPy150Open Exa-Networks/exabgp/lib/exabgp/dep/pyparsing.py/ParseElementEnhance.checkRecursion/swapped operands of `in`