Can I add conditional statements in Gurobi - Python?

Answered

Eduardo Praça

June 01, 2022 23:15

I have a constrain that changes whether i = 1 or i != 1

if t==1:
    m.addConstr(i_pit[p,i,t] == Ipi0[p][i] + other terms)
else:
    m.addConstr(i_pit[p,i,t] == i_pit[p,i,t-1] + same other terms)

Is there a way to condense everything into same line?


m.addConstr(i_pit[p,i,t] == (Ipi0[p][i] if t=1) + (i_pit[p,i,t-1] if t!=1)+ same other terms)

Thanks in advance,
Eduardo.

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Comments

2 comments

Official comment
Simranjit Kaur

Gurobi Staff

November 16, 2025 23:35
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.
Jaromił Najman

Gurobi Staff

June 02, 2022 12:58
Hi Eduardo,

I don't know whether there is a way to condense everything into one line and still keep it readable.

I would propose a 2 liner
```
m.addConstr(i_pit[p,i,1] == Ipi0[p][i] + other terms)
m.addConstrs(i_pit[p,i,t] == i_pit[p,i,t-1] + same other terms for t in range(T) if t != 1)
```
Best regards,
Jaromił
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