Addtional horizontal lines to create sections within a table

[borderite]

Is your feature request related to a problem? Please describe.

I often want to make groups of rows in a table. To indicate the grouping, I want to put a horizontal line between each pair of the adjacent row groups.

Describe the solution you'd like

It would be great if I could place a horizontal line after any row I pick (or before any row I pick).

Describe alternatives you've considered

The python package, rich, let me do what I would like to do (by using "end_section") when I want text outputs. But rich does not offer a method like get_latex_string.

Additional context

Here is an example of text outputs I desire to get. The horizontal line right above "Summary Statistics" is the one I cannot get using PrettyTable.

        Dependent variable: birthwdight       
=============================================
                     (1)      (2)      (3)   
---------------------------------------------
Regressor                                    
  smoker            -253.23  -217.58  -175.38
                   (26.801)  (26.09) (26.804)
  alcohol                    -30.491  -21.083
                            (72.548) (72.931)
  nprevist                     34.07   29.603
                            (3.6059) (3.5798)
  unmarried                           -187.13
                                     (27.654)
  const              3432.1   3051.2   3134.4
                   (11.887) (43.685) (44.112)
---------------------------------------------
Summary Statistics                           
  SER                583.73   570.47    565.7
  R-squared        0.028604  0.07285 0.088605
  Adj. R-squared    0.02828 0.071922 0.087388
---------------------------------------------

[kinredon]

How to use this function?

[hugovk]

@kinredon It hasn't been implemented. I would welcome a PR, something similar to Rich's end_section sounds pretty good.

https://rich.readthedocs.io/en/stable/reference/table.html#rich.table.Row