在大熊猫GroupBy中排序

Question

我有一个pandas groupby，它导致下面的一组（第三列是总观测值的百分比）。

我想将第二列按第三列排序，这样“ 0-20”组将从高中开始，然后是高中，然后是一些大学，等等，然后是“ 80-90”组将从学士学位开始，然后是研究生学位，等等。

换句话说，我想按第三列对每个income_name字段中的educ_name字段进行排序。但是，我不知道该怎么做。任何帮助将非常感激。

income_name  educ_name
0-20         Assoc Degree       11.0
             BA Degree           9.0
             Graduate Degree     3.0
             High school        33.0
             No High School     26.0
             Some College       17.0
20-40        Assoc Degree       13.0
             BA Degree          13.0
             Graduate Degree     5.0
             High school        33.0
             No High School     19.0
             Some College       17.0
40-60        Assoc Degree       12.0
             BA Degree          19.0
             Graduate Degree     9.0
             High school        30.0
             No High School     11.0
             Some College       19.0
60-80        Assoc Degree       14.0
             BA Degree          27.0
             Graduate Degree    15.0
             High school        24.0
             No High School      5.0
             Some College       16.0
80-90        Assoc Degree       12.0
             BA Degree          35.0
             Graduate Degree    26.0
             High school        13.0
             No High School      2.0
             Some College       12.0
90-100       Assoc Degree        6.0
             BA Degree          39.0
             Graduate Degree    39.0
             High school         7.0
             No High School      3.0
             Some College        6.0