import json

# 读取爬取结果
with open("movies.json", "r", encoding="utf-8") as f:
    data = json.load(f)
movies = data["movies"]

# 容错判断，避免无数据时报错
if not movies:
    print("错误：无电影数据，请先运行爬虫q2_1.py！")
else:
    # ① 最高、最低评分电影
    sorted_movies = sorted(movies, key=lambda x: x["rating"])
    min_m = sorted_movies[0]
    max_m = sorted_movies[-1]
    print("① 评分极值：")
    print(f"最低分：{min_m['title']} {min_m['rating']}")
    print(f"最高分：{max_m['title']} {max_m['rating']}")

    # ② 各类型数量，字典输出
    genre_stat = {}
    for m in movies:
        g = m["genre"]
        genre_stat[g] = genre_stat.get(g, 0) + 1
    print("\n② 电影类型统计字典：")
    print(genre_stat)

    # ③ 各导演影片数量，字典输出
    dir_stat = {}
    for m in movies:
        d = m["director"]
        dir_stat[d] = dir_stat.get(d, 0) + 1
    print("\n③ 导演影片数量统计字典：")
    print(dir_stat)

    # ④ 2020年（含）后上映总数
    count_2020 = 0
    for m in movies:
        try:
            year = int(m["year"])
            if year >= 2020:
                count_2020 += 1
        except ValueError:
            continue
    print(f"\n④ 2020年（含）后上映电影总数：{count_2020}")