code: def sku_update(self, product_id, properties, session, **kwargs):
          '''taobao.fenxiao.product.sku.update 产品sku编辑接口
          
          产品SKU信息更新'''
          request = TOPRequest('taobao.fenxiao.product.sku.update')
          request['product_id'] = product_id
          request['properties'] = properties
          for k, v in kwargs.iteritems():
              if k not in ('quantity', 'standard_price', 'agent_cost_price', 'sku_number', 'dealer_cost_price') and v==None: continue
              request[k] = v
          self.create(self.execute(request, session), fields=['result','created'], models={'created':TOPDate})
          return self sku_update(self, product_id, properties, session, **kwargs):
          '''taobao.fenxiao.product.sku.update 产品sku编辑接口
          
          产品SKU信息更新'''
          request = TOPRequest('taobao.fenxiao.product.sku.update')
          request['product_id'] = product_id
          request['properties'] = properties
          for k, v in kwargs.iteritems():
              if k not in ('quantity', 'standard_price', 'agent_cost_price', 'sku_number', 'dealer_cost_price') and v==None: continue
              request[k] = v
          self.create(self.execute(request, session), fields=['result','created'], models={'created':TOPDate})
          return self
docs: taobao.fenxiao.product.sku.update 产品sku编辑接口
          
          产品SKU信息更新