addGenConstrAbs ( resvar, argvar, name="" )
Add a new general constraint of type GRB.GENCONSTR_ABS to a model.
An ABS constraint states that the resultant variable should be equal to the absolute value of the argument variable .
You can also add an ABS constraint using the abs_ function.
resvar (Var): The variable whose value will be to equal the absolute value of the argument variable.
argvar (Var): The variable for which the absolute value 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 = abs(x1) model.addGenConstrAbs(x5, x1, "absconstr") # overloaded form model.addConstr(x5 == abs_(x1), name="absconstr")