code: def get_region_products(self, region):
          
  
          regions, retInfo = self.list_regions()
          if regions is None:
              return None
  
          for r in regions:
              if r.get('name') == region:
                  return r.get('products')
docs: 获得指定区域的产品信息
  
          Args:
              - region: 区域，如："nq"
  
          Returns:
              返回该区域的产品信息，若失败则返回None