我如何从分组数据中获取个人消费者ID？

Question

DGroup=df.groupby(['Conmer id','Purchase date']).count()


Conmer id  Purchase date            A          B         C      D

2397     2017-07-29 19:05:24        1         1          1     1  

4107     2016-03-31 19:06:54        1         0          0     1  

         2016-04-01 05:41:55        1         0          0     1  

         2016-04-02 06:18:16        1         0          0     1  

         2016-04-03 05:28:02        1         0          0     1  

         2016-04-04 05:47:08        1         0          0     1  

         2016-04-05 05:15:10        1         0          0     1  

         2016-04-09 05:40:06        1         0          0     1  

         2016-04-10 05:02:34        1         0          0     1  

         2016-04-11 05:06:18        1         0          0     1  


....
234       2016-03-31 11:06:54        1         0          0     1  

         2016-04-01 05:41:55        1         0          0     1  

         2016-04-02 16:18:16        1         0          0     1  

         2016-04-03 15:28:02        1         0          0     1  

         2016-04-04 15:47:08        1         0          0     1  

         2016-04-05 15:15:10        1         0          0     1  

         2016-04-09 15:40:06        1         0          0     1  

         2016-04-10 11:02:34        1         0          0     1  

         2016-04-11 13:06:18        1         0          0     1


2634     2015-08-16 18:26:46   1      1     1       1            0   

         2017-11-30 11:42:50   1      1     1       1            0   

         2017-12-01 06:14:47   1      1     1       1            0   

         2017-12-02 06:09:43   1      1     1       1            0   

.... 现在我如何从这个分组数据中获取个人消费者ID，将cunsumer id和日期（整行）放入另一个变量中进行绘图和分析？