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addGenConstrNorm ( resvar, vars, which, name="" )

Add a new general constraint of type GRB.GENCONSTR_NORM to a model.

A NORM constraint states that the resultant variable should be equal to the vector norm of the argument vector .

Arguments:

resvar (Var): The variable whose value will be equal to the vector norm of the other variables.

vars (list of Var, or tupledict of Var values, or 1-dim MVar): The variables over which the vector norm will be taken. Note that this may not contain duplicates.

which (float): Which norm to use. Options are 0, 1, 2, and any value greater than or equal to GRB.INFINITY.

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.

Example usage:

  # x5 = 2-norm(x1, x3, x4)
model.addGenConstrNorm(x5, [x1, x3, x4], 2.0, "normconstr")