I am solving a Mixed Integer Problem with Gurobi package in Python. The problem is I do not know how to fix indices i for a below constraint:
w(t) = x(t,i=1) - s(t,i=1) ∀t ∈ N
t and i are indices from different sets. I write the following code but it does not work. Could you please help me with it?
d =[18,7,6,5,10,1,8]
sh[1,2,3,4,5]
m=len(sh)
p=len(d)
for t in range(p):
model.addConstr(w[t] == x[t, 1] - s[t,1])
I am going to write a code for the part i=1 but I can not. Writing even index.sh('1') does not help me.
I tried the written code but it shows an error. I am new to Python and need help to solve this issue
Please look at the below listing. I have assumed that index i
has only one element.
import gurobipy as gp
from gurobipy import GRB
d =[18,7,6,5,10,1,8]
sh = [1,2,3,4,5]
m=len(sh)
p=len(d)
model = gp.Model("")
w = model.addVars(p)
# assuming that length of the second index is 1
x = model.addVars(p, 1)
s = model.addVars(p, 1)
for t in range(p):
model.addConstr(w[t] == x[t, 0] - s[t, 0])