CODEWITHSUNDEEP
pythonpyomo
frquestions
frquestions

Reputation: 79

pyomo constraint express ranged inequality expressions

I'm noob w pyomo. I'd like to do this: 

for w in ww:
    model.constraints.add(
        100 >= sum(8 * model.w[w, d, s] for d in dd for s in ss) >= 50
    )

instead I'd tried this way:

for w in ww:
    model.constraints.add(
        100 >= sum(8 * model.w[w, d, s] for d in dd for s in ss)
    )

for w in ww:
    model.constraints.add(
        50 <= sum(8 * model.w[w, d, s] for d in dd for s in ss)
    )

but It didn't work. It

WARNING: Loading a SolverResults object with a warning status into
    model=unknown;
        message from solver=<undefined>

I'm missing something, can u tell me what?

Upvotes: 0

Views: 1416

Answers (1)

frquestions
frquestions

Reputation: 79

Solved. I found 

WARNING: Loading a SolverResults object with a warning status into
    model=unknown;
        message from solver=<undefined>

because the model is infeasible.

Upvotes: 1

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