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.

        Example::

            patt = OneOrMore(Word(alphas))
            patt.parseString('ablaj /* comment */ lskjd') # -> ['ablaj']

            patt.ignore(cStyleComment)
            patt.parseString('ablaj /* comment */ lskjd') # -> ['ablaj', 'lskjd']
        """
        if isinstance(other, basestring):
            other = Suppress(other)

        if isinstance( other, Suppress ):
            if other not in self.ignoreExprs:
                self.ignoreExprs.append(other)
        else:
            self.ignoreExprs.append( Suppress( other.copy() ) )
        return self