def checkFieldName(field_name):
    if field_name not in data_fields:
        raise ValueError('%r is not a defined simple registration field' %
                         (field_name,))

# URI used in the wild for Yadis documents advertising simple
# registration support
Should return empty env when name is '_default'
dataset/ETHPy150Open CollabQ/CollabQ/openid/extensions/sreg.py/checkFieldName--crossover with--dataset/ETHPy150Open tobami/littlechef/tests/test_lib.py/TestLib.test_get__default_environment