Pyomo：如何施加决策变量必须是特定 integer 的倍数的约束？

Question

I am making an AbstractModel in Pyomo and I want to impose as a constraint the following:

• My decision variables are Xij, defined as: model.x = Var(model.I, model.J, domain=NonNegativeIntegers)

• The constraint is that Xij must be zero or a multiple of 50.

I am trying to do so by using the remainder but when making the constraint with % or something similar I obtain that % does not support using int.

How would you propose this constraint?

Example:

Example of constraint that I have tried

Answer 1

"Xij must be zero or a multiple of 50"

 variables
    y(i,j) ∈ {0,1,2,3...}
    x(i,j) ≥ 0
 constraint
    x(i,j) = 50*y(i,j)