KeyError ( 0 0 0)

回答済み

Rayan SAAD

2023年06月01日 14:54

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Helloo,

Please, i have a littel problem, i need some help

I defined this Binary variable Z

After that i tried to introduce on it the quicksum fonction

I have this error message 

Thank you,

 

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  Eli Towle

  • Gurobi Staff

  2023年06月01日 21:39

  On line 25, you assign the Var object returned by Model.addVar() to \(\texttt{Z[i, K, t]}\):

  Z[i, K, t] = model.addVar(...)

  You should use \(\texttt{k}\) instead of \(\texttt{K}\) here.

  To simplify the code, consider using Model.addVars() to construct \(\texttt{Z}\):

  Z = model.addVars(I, K, T, vtype=gp.GRB.BINARY, name="Z")

  With this approach, \(\texttt{Z}\) is a tupledict object. The tupledict class includes helper methods to make model-building easier. For example, you could then use the tupledict.sum() method to simplify the creation of \(\texttt{result_3}\):

  result_3 = 38 * Z.sum()

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  Rayan SAAD

  2023年06月02日 13:39

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  ohh I see,

  Thanks a lot !

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