import json

# 1. 读取数据
with open('movies.json', 'r', encoding='utf-8') as f:
    movies = json.load(f)

# 2. ① 找出评分最高和最低的电影
max_rating_movie = max(movies, key=lambda x: x['rating'])
min_rating_movie = min(movies, key=lambda x: x['rating'])
print(f"评分最高电影: {max_rating_movie['title']} - {max_rating_movie['rating']}")
print(f"评分最低电影: {min_rating_movie['title']} - {min_rating_movie['rating']}")

# 3. ② 统计各类型的电影数量 (字典格式)
genre_counts = {}
for movie in movies:
    genre = movie['genre']
    genre_counts[genre] = genre_counts.get(genre, 0) + 1
print("各类型电影数量统计:")
print(json.dumps(genre_counts, ensure_ascii=False, indent=4))

# 4. ③ 统计各导演的电影数量 (字典格式)
director_counts = {}
for movie in movies:
    director = movie['director']
    director_counts[director] = director_counts.get(director, 0) + 1
print("各导演电影数量统计:")
print(json.dumps(director_counts, ensure_ascii=False, indent=4))

# 5. ④ 统计2020年（含）以后上映的电影数量
count_post_2020 = sum(1 for movie in movies if movie['year'] >= 2020)
print(f"2020年(含)以后上映的电影数量: {count_post_2020}")