setAttr ( attrname, newvalue )

Set the value of a variable attribute. Note that attribute changes are handled in a lazy fashion. The effect of a change isn't visible until the next call to Model.update or Model.optimize.

The full list of available attributes can be found in the Attributes section.

Raises an AttributeError if the specified attribute doesn't exist or can't be set.


attrname: The attribute being modified.

newvalue: The desired new value of the attribute.

Example usage:

  var.setAttr(GRB.Attr.ub, 0.0)
  var.setAttr("ub", 0.0)