[Scip] multiple pricer

[Sebastian Ruther]

  Hello,

I am implementing a Branch-and-Price method that has several pricing 
problems. They are similar but have different underlying networks. 
Ultimately I want to run the pricing problems in parallel but most 
likely not all of them in each iteration. So for example I might want to 
run them in groups of ten or so.
So I figured that just adding all the different pricers calling 
SCIPincludeObjPricer for each of them and give them different priorities 
wouldn't do the trick unless I can gain access to the priorities after 
every time the master problem is solved.

The other option would be to have only one pricer that holds all the 
pricing problems and their data. Obviously, controlling the sequence of 
pricing problems would be easy in this case. Can you think of any 
reasons why I shouldn't do it this way?

Thanks,
Sebastian