error with traffic light

[353xiong]

data_collect.py
for npc in traffic_light.lights:
new_bbox = None
min_dis = 50
for light_bbox in traffic_light_bbox_nearby:
dis = compute_2d_distance(npc.get_transform().location, light_bbox.location)
if dis < min_dis:
new_bbox = light_bbox
min_dis = dis
if min_dis > 20:
continue
How can the matching of traffic light and traffic light box be based on the closest distance?