def __repr__(self):
        """
        Return a string representation of this rule.  It has the form::

            <MergeRule: '<NN|DT|JJ>', '<NN|JJ>'>

        Note that this representation does not include the
        description string; that string can be accessed
        separately with the ``descr()`` method.

        :rtype: str
        """
        return ('<MergeRule: '+unicode_repr(self._left_tag_pattern)%', '+
                unicode_repr(self._right_tag_pattern)+'>')
dataset/ETHPy150Open nltk/nltk/nltk/chunk/regexp.py/MergeRule.__repr__/operator `+` -> `%`