message: Update traffic-light-controlled-intersection.py
diff: @@ -7,7 +7,7 @@ import threading
  class TrafficLight(object):
  def __init__(self):
  - self.__lock = threading.Lock()
  + self.__l = threading.Lock()
  self.__light = 1
  def carArrived(self, carId, roadId, direction, turnGreen, crossCar):
  @@ -19,7 +19,7 @@ class TrafficLight(object):
  :type crossCar: method --> // Use crossCar() to make car cross the intersection
  :rtype: void
  """
  - with self.__lock:
  + with self.__l:
  if self.__light != roadId:
  self.__light = roadId
  turnGreen()
  