ifDegree1
This script is designed to be used as an itemFilter for the ‘lsThroughFilter’ MEL command. It filters the input list to return only NURBS surfaces (shape nodes) whose U or V Degree is 1 (linear).
First, prepare the itemFilter. You only have to do this once per Maya session.
itemFilter -byScript ifDegree1 ifDegree1;
You may then use the filter with the ‘lsThroughFilter’ MEL command:
lsThroughFilter ifDegree1;
See Maya's documentation on itemFilters for more information.