Pythonic的方式來結合加入CSV作家

Question

我有兩個CSV行，我想只遍歷一次。注意它們結合了兩個模型，庫存和材料。我怎麼能將這兩個表組合成一個CSV導出？

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，這很簡單。

[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]