Add a new general constraint of type GRB.GENCONSTR_OR to a model.
An OR constraint states that the binary resultant variable should be if and only if any of the operand variables is equal to . If all operand variables are , then the resultant should be as well.
Note that all variables participating in such a constraint will be forced to be binary, independent of how they were created.
You can also add an OR constraint using the or_ function.
resvar (Var): The variable whose value will be equal to the OR concatenation of the other variables.
vars (list of Var): The variables over which the OR concatenation will be taken.
name (string, optional): Name for the new general constraint. Note that name will be stored as an ASCII string. Thus, a name like 'AB' will produce an error, because '' can not be represented as an ASCII character. Note also that names that contain spaces are strongly discouraged, because they can't be written to LP format files.
# x5 = or(x1, x3, x4) model.addGenConstrOr(x5, [x1, x3, x4], "orconstr") # overloaded forms model.addConstr(x5 == or_([x1, x3, x4]), "orconstr") model.addConstr(x5 == or_(x1, x3, x4), "orconstr")