正常PrettyTable输出的格式是这样的:
+------+----------+----------+------------+
| 编号 | 云编号 | 名称 | IP地址 |
+------+----------+----------+------------+
| 1 | server01 | 服务器01 | 172.16.0.1 |
| 2 | server02 | 服务器02 | 172.16.0.2 |
| 3 | server03 | 服务器03 | 172.16.0.3 |
+------+----------+----------+------------+
如何给表格内部也加上边框,如下显示
+------+----------+----------+------------+
| 编号 | 云编号 | 名称 | IP地址 |
+------+----------+----------+------------+
| 1 | server01 | 服务器01 | 172.16.0.1 |
+------+----------+----------+------------+
| 2 | server02 | 服务器02 | 172.16.0.2 |
+------+----------+----------+------------+
| 3 | server03 | 服务器03 | 172.16.0.3 |
+------+----------+----------+------------+