method doc Optimization Suggestions

[alien10086]

My running environment
django
python 2.7
spyne 2.12.16
When I write it like this
`
class SecManageObject(ServiceBase):

@rpc(Unicode, _returns=Iterable(Unicode))
def queryConfig(self, oprCode):
    '''
    安全管理中心查询参数配置信息
    '''
    yield "200"

`
Keeps returning 500 errors without detailed error information
After a period of error checking, I found that I could not process the document

When I write it like this
`
class SecManageObject(ServiceBase):

@rpc(Unicode, _returns=Iterable(Unicode))
def queryConfig(self, oprCode):
    u'''
    安全管理中心查询参数配置信息
    '''
    yield "200"

`
So I suggest throw it error message