taobao.shop.remainshowcase.get 获取卖家店铺剩余橱窗数量
        
        目前只支持标题、公告和描述的更新

def update(self, session, title=None, bulletin=None, desc=None):
        '''taobao.shop.remainshowcase.get 获取卖家店铺剩余橱窗数量
        
        目前只支持标题、公告和描述的更新'''
        request = TOPRequest('taobao.shop.remainshowcase.get')
        if title!=None: request['title'] = title
        if bulletin!=None: request['bulletin'] = bulletin
        if desc!=None: request['desc'] = desc
        self.create(self.execute(request, session)['shop'])
        return self