code: def getSpecialPrice(self, product, store_view=None, identifierType=None):
          
          return self.call(
              'catalog_product.getSpecialPrice', [
                  product, store_view, identifierType
              ]
          )
docs: Get product special price data
  
          :param product: ID or SKU of product
          :param store_view: ID or Code of Store view
          :param identifierType: Defines whether the product or SKU value is
                                 passed in the "product" parameter.
  
          :return: Dictionary