我有一个Pandas DataFrame，结构是这样的。
+-------+------------+------------------------------------+----------+
| index | Date | path | Count |
+-------+------------+------------------------------------+----------+
| 0 | 2020-06-10 | about/v1/ | 10865 |
| 1 | 2020-06-10 | about/v1/?status=active | 2893 |
| 2 | 2020-06-10 | about/v1/?status=active?name=craig | 264 |
| 3 | 2020-06-09 | about/v1/?status=active?name=craig | 182 |
+-------+------------+------------------------------------+----------+
我如何按路径和日期分组，而不使用查询字符串，使表格看起来像这样？
+-------+------------+-------------------------+----------+
| index | Date | path | Count |
+-------+------------+-------------------------+----------+
| 0 | 2020-06-10 | about/v1/ | 10865 |
| 1 | 2020-06-10 | about/v1/?status=active | 3157 |
| 3 | 2020-06-09 | about/v1/?status=active | 182 |
+-------+------------+-------------------------+----------+