Default string output of TableSet with multiple layers of nesting throws `AttributeError: 'TableSet' object has no attribute 'rows'`

[vergenzt]

Default string output of TableSet with multiple layers of nesting throws `AttributeError: 'TableSet' object has no attribute 'rows'`

[jpmckinney]

Thank you for reporting!

The issue was that group_by – uniquely – returns a TableSet instead of a Table. Calling group_by a second time yielded a TableSet containing TableSets (instead of directly containing Tables), causing the error.

[jpmckinney]

Ah, my solution worked for group_by, but it messed up pivot (which calls group_by and aggregate) and aggregate (which contains logic for nested table sets).

[jpmckinney]

Does this make any sense for that input?

| table   | rows |
| ------- | ---- |
| foo.FOO | 2    |
| bar.BOZ | 1    |
| bar.BAZ | 1    |
| bar.BIZ | 1    |

[jpmckinney]

The patch: #776