如何通过两个值对这个元组列表进行排序？

Question

我有一个元组列表：[(2, Operation.SUBSTITUTED), (1, Operation.DELETED), (2, Operation.INSERTED)]

我想用两种方式对这个列表进行排序：

先按其第一个值按升序排序，即1, 2, 3... etc 第二个按字母倒序排列的第二个值，即Operation.SUBSTITITUTED, Operation.INSERTED, Operation, DELETED

因此，上述清单应按以下顺序排列：

[(1, Operation.DELETED), (2, Operation.SUBSTITUTED), (2, Operation.INSERTED)]

我该怎么整理这个单子？在

Answer 1

由于排序是guaranteed to be stable，您可以通过两个步骤来完成：

lst = [(2, 'Operation.SUBSTITUTED'), (1, 'Operation.DELETED'), (2, 'Operation.INSERTED')]

res_int = sorted(lst, key=lambda x: x[1], reverse=True)
res = sorted(res_int, key=lambda x: x[0])

print(res)

# [(1, 'Operation.DELETED'), (2, 'Operation.SUBSTITUTED'), (2, 'Operation.INSERTED')]