我有两个 CSV 行，我只想迭代一次。请注意，它们结合了两个模型:库存和 Material 。如何将两个表合并为一个 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]
最佳答案
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]
关于将联接与 CSV writerow 相结合的 Pythonic 方式，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/34756356/