So I have a simple question… I want to indicate the number of nurse requests that were granted – working in python.

In java I have:

maxRequestsMet = model.newIntVar(0, Integer.MAX_VALUE, "max requests");
model.maximize(linearExpressionTackingTotalRequestsMet);
model.addEquality(maxRequestsMet, linearExpressionTackingTotalRequestsMet);

and then I show this value of maxRequests.

But I’m struggling to do the same in python.

You’d think that

 maxRequests = model.new_int_var(0, MAX_INT, "max requests")
 model.maximize(linearExpressionTackingTotalRequestsMet);
 model.add(maxRequests - linearExpressionTackingTotalRequestsMet == 0)

Would work but it doesn’t.

As soon as I add that extra constraint my model is no longer feasible – I remove the constraint, it goes back to feasible.