Hi everyone, i'm having a problem withe my restriccions, I get this error: KeyError: ((1, 0), 1) in my first restriction

Answered

Javier Gil

• November 18, 2023 16:33

Arcos = [(i,j) for i in range(10) for j in range(10) if i!=j]

Dias = range(1,31)

 

x = model.addVars(Arcos, Dias, vtype = GRB.BINARY, name = "x") 

y = model.addVars(Nodos, Dias, vtype = GRB.BINARY, name = "y")

 

model.addConstrs(((quicksum(x[a,d] for a in [x for x in Arcos if x[1]==j])) == y[j,d] for j in Nodos for d in Dias ), name = "R1")

I cant find the problem...

Related to

• KeyError

0

• 

  Riley Clement

  Gurobi Staff

  • November 19, 2023 09:32

  Hi Javier,

  If you run the command

  print(x)

  the error will become apparent.

  - Riley

  0

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