Python 3.x pandas多指标序列排序中的层次子集_Python 3.x_Pandas_Sorting_Multi Index

Python 3.x pandas多指标序列排序中的层次子集

python-3.x pandas sorting

Python 3.x pandas多指标序列排序中的层次子集,python-3.x,pandas,sorting,multi-index,Python 3.x,Pandas,Sorting,Multi Index,我有一个三级多索引系列： print(ser_test): Value Date Group Country 2014-01-31 3 AE example AR example 2014-02-28 3 AE example AR example 2014-03-31 3

我有一个三级多索引系列：

print(ser_test):
                            Value
Date       Group Country         
2014-01-31 3     AE       example
                 AR       example
2014-02-28 3     AE       example
                 AR       example
2014-03-31 3     AE       example
                 AR       example
2014-04-30 3     AE       example
                 AR       example
2014-05-30 3     AR       example
2014-06-30 2     AE       example
           3     AR       example
2014-07-31 2     AE       example
           3     AR       example
2014-08-29 2     AE       example
           3     AR       example
2014-09-30 2     AE       example
           3     AR       example
2014-10-31 2     AE       example
           3     AR       example
2014-11-28 2     AE       example
           3     AR       example
2014-12-31 2     AE       example
           3     AR       example

我的目标是先按国家对系列进行排序，然后按日期，忽略组级别以获得下一个结果：

                            Value
Date       Group Country         
2014-01-31 3     AE       example
2014-02-28 3     AE       example
2014-03-31 3     AE       example
2014-04-30 3     AE       example
2014-06-30 2     AE       example
2014-07-31 2     AE       example
2014-08-29 2     AE       example
2014-09-30 2     AE       example
2014-10-31 2     AE       example
2014-11-28 2     AE       example
2014-12-31 2     AE       example
2014-01-31 3     AR       example
2014-02-28 3     AR       example
2014-03-31 3     AR       example
2014-04-30 3     AR       example
2014-05-30 3     AR       example
2014-06-30 3     AR       example
2014-07-31 3     AR       example
2014-08-29 3     AR       example
2014-09-30 3     AR       example
2014-10-31 3     AR       example
2014-11-28 3     AR       example
2014-12-31 3     AR       example

我需要进一步的组级别，所以我不能简单地消除它
因此，我尝试使用如下排序索引方法：

print(ser_test.sort_index(level = ['Country', 'Date']))
或者像这样：

print(ser_test.sort_index(level = ['Country', 'Date'], sort_remaining = False))
在这两种情况下，我都收到了一个结果，组级别参与了排序过程，并且在日期级别之前具有优先级：

Value Date Group Country 2014-06-30 2 AE example 2014-07-31 2 AE example 2014-08-29 2 AE example 2014-09-30 2 AE example 2014-10-31 2 AE example 2014-11-28 2 AE example 2014-12-31 2 AE example 2014-01-31 3 AE example 2014-02-28 3 AE example 2014-03-31 3 AE example 2014-04-30 3 AE example 2014-01-31 3 AR example 2014-02-28 3 AR example 2014-03-31 3 AR example 2014-04-30 3 AR example 2014-05-30 3 AR example 2014-06-30 3 AR example 2014-07-31 3 AR example 2014-08-29 3 AR example 2014-09-30 3 AR example 2014-10-31 3 AR example 2014-11-28 3 AR example 2014-12-31 3 AR example
我尝试使用sort_index的所有选项，并通过这段代码获得了意想不到的成功：

print(ser_test.sort_index(level = ['Country', 'Date'], ascending = [True, True])) Value Date Group Country 2014-01-31 3 AE example 2014-02-28 3 AE example 2014-03-31 3 AE example 2014-04-30 3 AE example 2014-06-30 2 AE example 2014-07-31 2 AE example 2014-08-29 2 AE example 2014-09-30 2 AE example 2014-10-31 2 AE example 2014-11-28 2 AE example 2014-12-31 2 AE example 2014-01-31 3 AR example 2014-02-28 3 AR example 2014-03-31 3 AR example 2014-04-30 3 AR example 2014-05-30 3 AR example 2014-06-30 3 AR example 2014-07-31 3 AR example 2014-08-29 3 AR example 2014-09-30 3 AR example 2014-10-31 3 AR example 2014-11-28 3 AR example 2014-12-31 3 AR example
这很奇怪，我不确定这是否是一种获得有保证的预期排序结果的通用方法，而使用多索引对我来说是一个关键的选择

那么，您能否帮助我理解排序索引原则，并向我分享此特定情况下的一段代码？
您可以尝试升级到pandas的最新版本，在pandas 0.25.0中测试，运行良好：

print(df.sort_index(level = ['Country', 'Date'])) Value Date Group Country 2014-01-31 3 AE example 2014-02-28 3 AE example 2014-03-31 3 AE example 2014-04-30 3 AE example 2014-06-30 2 AE example 2014-07-31 2 AE example 2014-08-29 2 AE example 2014-09-30 2 AE example 2014-10-31 2 AE example 2014-11-28 2 AE example 2014-12-31 2 AE example 2014-01-31 3 AR example 2014-02-28 3 AR example 2014-03-31 3 AR example 2014-04-30 3 AR example 2014-05-30 3 AR example 2014-06-30 3 AR example 2014-07-31 3 AR example 2014-08-29 3 AR example 2014-09-30 3 AR example 2014-10-31 3 AR example 2014-11-28 3 AR example 2014-12-31 3 AR example

非常感谢，@jezrael！我已经将pandas从0.24.2更新到了0.25.1，sort_索引现在正按照我的期望工作！