Shutian Li

Hi Jaromił, Thanks for your response. Are there any methods that allow me to include two or three models that share the same sets?  For example, what I want such as:  CUSTOMERS = [i for i in range(...

I need to code \[ \sum_{i \in S} \sum_{a \in A} P_{is}^{a}x_{i}^{a}\]  I wrote it as follows, it works well in a separate python file but when I use the gurobi, it does not make sense. Here is my c...