tkinter: tksheet

[Rich Shepard]

Reading the doc for tksheet tells me that it allows me to modify cells (or
entire rows) as well as display them. What I don't see is whether I can add
a new row using tksheet and change the column used for sorting (e.g.,
sorting by company number or company name).

If you have experience with tksheet perhaps you can answer my questions
about it's capabilities.

Rich