def raise_403(instance, msg=None):
    instance.response.status = 403
    if msg:
        instance.response.body_raw = {'error': msg}
    raise ResponseException(instance.response)
Returns selectors of fields to be used by `itertools.compress()`.
dataset/ETHPy150Open pneff/wsgiservice/wsgiservice/status.py/raise_403--crossover with--dataset/ETHPy150Open Stiivi/brewery/brewery/metadata.py/FieldMap.field_selectors