List comprehension syntax in addGenConstrAnd type of constraints

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Madhushini Narayana Prasad

2022年02月07日 20:51

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Hi,

I need to model a constraint which is like --> y is true if x is true and z[i] are true for i in lst_i.

What is the best way to model this constraint using gurobipy?

I am using 'addGenConstrAnd' construct within a for loop for every i in lst_i, but I am sure there exists an elegant way to model the list comprehension within addGenConstrAnd/ addGenConstrOr type of constraints. Any help is appreciated!

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  Simranjit Kaur

  • Gurobi Staff

  2025年11月16日 23:44

  This post is more than three years old. Some information may not be up to date. For current information, please check the Gurobi Documentation or Knowledge Base. If you need more help, please create a new post in the community forum, or try Gurobot, our chatbot interface offering instant, expert-level support.
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  Maliheh Aramon

  • Gurobi Staff

  2022年02月08日 04:23

  Hi Madhushini,

   

  You can first build the list of variables over which the AND concatenation will be taken and then use the Model.addGenConstrAnd() method.

  vars = [x]
  vars.extend([z_i for i in lst_i])
  model.addGenConstrAnd(y, vars, name="and")

  Best regards,

  Maliheh

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  Madhushini Narayana Prasad

  2022年02月08日 23:35

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  Thank you, that works!

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