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addGenConstrAnd ( resvar, vars, name="" )
Add a new general constraint of type GRB.GENCONSTR_AND to a model.
An AND constraint states that the binary resultant variable should be if and only if all of the operand variables are equal to . If any of the operand variables is , 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 AND constraint using the and_ function.
resvar (Var): The variable whose value will be equal to the AND concatenation of the other variables.
vars (list of Var): The variables over which the AND 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 = and(x1, x3, x4) model.addGenConstrAnd(x5, [x1, x3, x4], "andconstr") # overloaded forms model.addConstr(x5 == and_([x1, x3, x4]), "andconstr") model.addConstr(x5 == and_(x1, x3, x4), "andconstr")