Houdini Python SOP

Polyline_from_edges.py

node = hou.pwd()
geo = node.geometry()
geo.deletePrims(geo.prims(), True)

pt_delete = set(geo.points())

ptns = node.parm('group').eval().split()

for ptn in ptns:
    edges = geo.globEdges(ptn)        
    pre_pt_idx = -1
    for e in edges:
        points = e.points()
        if pre_pt_idx != points[0].number():
            poly = geo.createPolygon()
            poly.setIsClosed(False)
            poly.addVertex(points[0])
            pt_delete.discard(points[0])
        
        poly.addVertex(points[1])
        pt_delete.discard(points[1])
        pre_pt_idx = points[1].number()

geo.deletePoints(list(pt_delete))