Pythonic的方式来结合加入CSV作家

Question

我有两个CSV行，我想只遍历一次。注意它们结合了两个模型，库存和材料。我怎么能将这两个表组合成一个CSV导出？

表：

[outcsv.writerow([getattr(curr, column.name) for column in Inventory.__mapper__.columns]) for curr in records] 

加入：

[outcsv.writerow([getattr(curr.material, column.name) for column in Material.__mapper__.columns]) for curr in records] 

Answer 1

哦，这很简单。

[outcsv.writerow([getattr(curr, column.name) for column in Inventory.__mapper__.columns] + [getattr(curr.material, column.name) for column in Material.__mapper__.columns]) for curr in records]