TypeError를 제공하는 검색 메서드 : 'int'개체는 반복 할 수 없습니다.

편의 API를 제거했을 때 발생하는 문제는 TypeError: 'int' object is not iterable이 줄을 가리키며 id, = args[0]... 이 문제를 어떻게 해결해야합니까? args [0]을 할당하는 문제가이 스택 질문 과 비슷 합니까?

코드 :
object.py (상위 클래스)

def retrieve_assessment_result(self, *args):
    id, owner, assessment = None, None, None
    if len(args) == 1:
        id, = args[0]
    elif len(args) == 2:
        owner, assessment = args
        print 'testa', owner, assessment, id
    else:
        raise ValueError('Value being passed is an object')
    if id is not None:
        print 'testi', id
        return self.session.query(Assessment_Result).\
        filter(Assessment_Result.id == id).one()
    elif owner is not None:
        print 'testo', owner
        return self.session.query(Assessment_Result).\
        filter(Assessment_Result.owner == owner).one()
    elif assessment is not None:
        print 'testa', assessment
        return self.session.query(Assessment_Result).\
        filter(Assessment_Result.assessment == assessment).one()

comfort.py (하위 클래스)

def retrieve_assessment_result(self, username, name):
    owner = self.retrieve_user(username)
    assessment = self.retrieve_assessment(name)
    return super(ConvenienceAPI, self).retrieve_assessment_result(owner, assessment)

질문 2에 대한 역 추적 (내가 ID혼자 확인하기 위해 자식 클래스를 제거했을 때 )

...
  File "/usr/local/lib/python2.7/site-packages/pyramid-1.5.7-py2.7.egg/pyramid/config/views.py", line 501, in _requestonly_view
    response = view(request)
  File "/Users/ack/code/venv/NotssWEB/notssweb/views/views.py", line 368, in get_assessment_result
    assessment_result = api.retrieve_assessment_result(assessment_result_id)
  File "/usr/local/lib/python2.7/site-packages/notssdb/api/object.py", line 313, in retrieve_assessment_result
    id, = args[0] # <-- this the issue? see object.py above
TypeError: 'int' object is not iterable