from vehicle import *


class Lane:
    """"
    Represents a lane as a list of fixed length. A position in the lane may be occupied
    by a vehicle or free (contains None). Vehicles enter the lane at the high index end 
    exit from index 0."""


def __init__(self, length):
    pass

    def __str__(self):
        pass

    def enter(self, vehicle):
        pass

    def last_free(self):
        pass

    def step(self):
        pass

    def get_first(self):
        pass

    def remove_first(self):
        pass


def main():
    pass


if __name__ == '__main__':
    main()