帮我用python做一个电影院购票系统代码

好的，下面是一个简单的电影院购票系统的 Python 代码：

class Movie:
    def __init__(self, title, rating, genre, duration):
        self.title = title
        self.rating = rating
        self.genre = genre
        self.duration = duration
        
class Cinema:
    def __init__(self):
        self.movies = []
        
    def add_movie(self, movie):
        self.movies.append(movie)
        
    def show_movies(self):
        for i, movie in enumerate(self.movies):
            print(f"{i+1}. {movie.title} ({movie.rating}) - {movie.genre} ({movie.duration} mins)")
            
class Ticket:
    def __init__(self, movie_index, seat_number):
        self.movie_index = movie_index
        self.seat_number = seat_number
        
class BookingSystem:
    def __init__(self):
        self.cinema = Cinema()
        self.tickets = {}
        
    def add_movie(self, title, rating, genre, duration):
        movie = Movie(title, rating, genre, duration)
        self.cinema.add_movie(movie)
        
    def show_movies(self):
        self.cinema.show_movies()
        
    def buy_ticket(self, movie_index, seat_number):
        if movie_index < 1 or movie_index > len(self.cinema.movies):
            print("Invalid movie index.")
            return False
        
        if seat_number in self.tickets:
            print("Seat already taken.")
            return False
        
        self.tickets[seat_number] = Ticket(movie_index, seat_number)
        print("Ticket purchased successfully!")
        return True

这个代码中包含了三个类：Movie、Cinema 和 BookingSystem。Movie 类用于存储电影信息，Cinema 类用于管理电影库和展示电影信息，BookingSystem 类用于购票和管理已购票的信息。

你可以通过以下代码来测试这个系统：

booking_system = BookingSystem()

booking_system.add_movie("Avengers: Endgame", "PG-13", "Action, Adventure, Drama", 181)
booking_system.add_movie("The Lion King", "PG", "Animation, Adventure, Drama", 118)

booking_system.show_movies()

booking_system.buy_ticket(1, "A1")
booking_system.buy_ticket(1, "A1")
booking_system.buy_ticket(3, "B2")

输出结果为：

1. Avengers: Endgame (PG-13) - Action, Adventure, Drama (181 mins)
2. The Lion King (PG) - Animation, Adventure, Drama (118 mins)
Ticket purchased successfully!
Seat already taken.
Invalid movie index.

希望这个代码能够帮到你！