def verify_default(self, dp, stats):
        type_ = self._verify['type']
        headers = self._verify['headers']
        value = self._verify['value']
        mask = self._verify['mask']
        value_masked = self._masked(type_, value, mask)
        all_bits_masked = self._verify['all_bits_masked']

        field = None
        for s in stats:
            for f in s.match.fields:
                if headers in f.header:
                    field = f
                    break

        if field is None:
            if self._is_all_zero_bit(type_, mask):
                return True
            return 'Field not found.'

        f_value = field.value
        if hasattr(field, 'mask'):
            f_mask = field.mask
        else:
            f_mask = None

        if (f_value == value) or (f_value == value_masked):
            if (f_mask == mask) or (all_bits_masked and f_mask is None):
                return True

        return "send: %s/%s, reply: %s/%s" \
            % (self._cnv_to_str(type_, value, mask, f_value, f_mask))
dataset/ETHPy150Open osrg/ryu/ryu/tests/integrated/test_add_flow_v12_matches.py/RunTest.verify_default/swapped operands of `in`