dummy_pants.py

def sv_main(corner1=[[]], corner2=[[]]):
    masked_items_out = []

    in_sockets = [
        ['v', 'corner1', corner1],
        ['v', 'corner2', corner2]
    ]

    if corner1 and corner1[0]:
        corner1 = corner1[0][0]
    if corner2 and corner2[0]:
        corner2 = corner2[0][0]
    
    if all([len(c) == 3 for c in [corner1, corner2]]):
        scn = bpy.context.scene
        # scn.render.use_border = True
        # set border for this tile
        
        c1x, c1y = corner1[:2]
        c2x, c2y = corner2[:2]
        
        bmin_x = c1x
        bmax_x = c2x
        bmin_y = c1y
        bmax_y = c2y        
        
        scn.render.border_min_x = bmin_x
        scn.render.border_max_x = bmax_x
        scn.render.border_min_y = bmin_y
        scn.render.border_max_y = bmax_y 
                
        print(corner1, corner2)


    out_sockets = [
        ['s', 'dummyout', masked_items_out]
    ]

    return in_sockets, out_sockets