import json

# 读取本地json文件
with open("movies.json", "r", encoding="utf-8") as f:
    data = json.load(f)
movie_list = data["movies"]

# ① 找出评分最高、最低电影并打印
ratings = [m["rating"] for m in movie_list]
max_rating = max(ratings)
min_rating = min(ratings)

max_movies = [m for m in movie_list if m["rating"] == max_rating]
min_movies = [m for m in movie_list if m["rating"] == min_rating]

print("===== 1. 评分极值电影 =====")
print("评分最高的电影：")
for m in max_movies:
    print(f"{m['title']} - {m['rating']}")
print("评分最低的电影：")
for m in min_movies:
    print(f"{m['title']} - {m['rating']}")

# ② 统计各类型电影数量
genre_count = {}
for m in movie_list:
    g = m["genre"]
    genre_count[g] = genre_count.get(g, 0) + 1
print("\n===== 2. 各类型电影数量 =====")
print(genre_count)

# ③ 统计各导演电影数量
director_count = {}
for m in movie_list:
    d = m["director"]
    director_count[d] = director_count.get(d, 0) + 1
print("\n===== 3. 各导演电影数量 =====")
print(director_count)

# ④ 统计2020（含）年后上映电影数量
count_after_2020 = sum(1 for m in movie_list if m["year"] >= 2020)
print("\n===== 4. 2020年(含)后上映电影总数 =====")
print(count_after_2020)