class LpConstraintVar is not documented

[MLopez-Ibanez]

Details for the issue

What did you do?

The documentation does not include the information regarding LpConstraintVar:

https://coin-or.github.io/pulp/technical/pulp.html?highlight=lpconstraintvar

What did you expect to see?

At minimum, a description of the init and various parameters such as "rhs", "sense", etc.

What did you see instead?

Nothing.

Useful extra information

Did you also

• [X ] Tried out the latest github version: https://github.com/coin-or/pulp
• [X] Searched for an existing similar issue: https://github.com/coin-or/pulp/issues?utf8=%E2%9C%93&q=is%3Aissue%20

[pchtsp]

Hello! You're right, we do not have that documented in pulp. Personally, although I more or less understand the purpose, I've never used LpConstraintVar so I'm not the best candidate. @stumitchell I'm guessing you know a little more? @MLopez-Ibanez maybe you want to volunteer to do some documentation and share ir via a PR :D ?

[MLopez-Ibanez]

Hi @pchtsp ! Actually, this was my first roadblock towards understanding how to do column generation with Pulp.

[pchtsp]

Have you taken a look at the column generation examples in PuLP? https://github.com/coin-or/pulp/blob/master/examples/CGcolumnwise.py https://github.com/coin-or/pulp/blob/master/examples/CG.py The first one uses LpConstraintVar.

I'm sorry I can't be of more help.

[MLopez-Ibanez]

Have you taken a look at the column generation examples in PuLP? https://github.com/coin-or/pulp/blob/master/examples/CGcolumnwise.py https://github.com/coin-or/pulp/blob/master/examples/CG.py The first one uses LpConstraintVar.

Yes, but I still do not understand that LpConstraintVar is doing and how to properly call it. If I knew I could document it.