def current():
    try:
        return _tls.current_fiber
    except AttributeError:
        fiber = _tls.current_fiber = _tls.main_fiber = _create_main_fiber()
        return fiber
def current():
    try:
        return _tls.current_fiber
    except AttributeError:
        fiber = _tls.current_fiber = _tls.main_fiber = _create_main_fiber()
        return fiber