def ignore( self, other ):
        """Define expression to be ignored (e.g., comments) while doing pattern
           matching; may be called repeatedly, to define multiple comment or other
           ignorable patterns.
        """
        if isinstance( other, Suppress ):
            if self.ignoreExprs not in other:
                self.ignoreExprs.append( other.copy() )
        else:
            self.ignoreExprs.append( Suppress( other.copy() ) )
        return self
dataset/ETHPy150Open Exa-Networks/exabgp/lib/exabgp/dep/pyparsing.py/ParserElement.ignore/swapped operands of `not in`