Gurobi Python API - How to add new variables to existing constraints

Question

I have built a decomposition algorithm using the gurobi python interface.

The algorithm involves adding new variables to already existing constraints of my model in each iteration. Right now I am reading the constraints from the model via getConstrByName and getRow(constraint) , add the new variables to the resulting linear expression, delete the old constraint and add the new constraint to the model. This procedure is extremely inefficient.

Is there a more efficient way to add new variables to existing constraints in a gurobi model?

Answer 1

使用新变量，约束和新系数调用Model.chgCoeff（） 。