How to put back a number-based index

[Michael Selik]

On Fri, May 13, 2016 at 12:27 PM David Shi via Python-list <
python-list at python.org> wrote:

> I lost my indexes after grouping in Pandas.
> I managed to rest_index and got back the index column.
> But How can I get back a index row?
>

Was the grouping an aggregation? If so, the original indexes are
meaningless. What you could do is reset_index before the grouping and when
you aggregate decide how to handle the formerly-known-as-index column (min,
max, mean, ?).