def get(self, parent_cid=None, cids=[], fields=[]):
        '''taobao.itemcats.get 获取后台供卖家发布商品的标准商品类目'''
        request = TOPRequest('taobao.itemcats.get')
        if not fields:
            itemCat = ItemCat()
            fields = itemCat.fields
        request['fields'] = fields
        if parent_cid!=None:
            request['parent_cid'] = parent_cid
        if cids:
            request['cids'] = ','.join([str(cid) for cid in cids])
        self.create(self.execute(request))
        return self.item_cats