def _require_unicode(name, value):

    if not isinstance(value, str_cls):
        raise TypeError('%s must be a unicode string, not %s' % (name, _type_name(value)))
Add flow.
dataset/ETHPy150Open golang/sublime-config/all/golangconfig.py/_require_unicode--crossover with--dataset/ETHPy150Open osrg/ryu/ryu/tests/switch/tester.py/OpenFlowSw.add_flow