def part2regulatory_elements():
# regulatory elements profit from pythons type system
lanelet = get_a_lanelet()
light = get_linestring_at_y(3)
regelem = TrafficLight(getId(), AttributeMap(), [light])
lanelet.addRegulatoryElement(regelem)
assert regelem in lanelet.regulatoryElements
lights = [regelem for regelem in lanelet.regulatoryElements if isinstance(regelem, TrafficLight)]
assert regelem in lights
assert light in lights[0].trafficLights
def getRegelem():
return TrafficLight(getId(), AttributeMap(), [getLineString()],
getLineString())