合并 pandas 数据框索引

Question

如何合并 2 个索引

index1
Out[8]: Int64Index([22, 23, 24, 25, 32, 33, 34], dtype='int64')

index2
Out[8]: Int64Index([20, 23, 24, 25, 32, 33, 34], dtype='int64')

从而获得

index3
Out[8]: Int64Index([20, 22, 23, 24, 25, 32, 33, 34], dtype='int64')

包含没有重复项的index1和index2？

Answer 1

使用union

In [1331]: index1.union(index2)
Out[1331]: Int64Index([20, 22, 23, 24, 25, 32, 33, 34], dtype='int64')