# q4/q4_3a/q4_3a.py
import json
import matplotlib.pyplot as plt

with open("../q2_1_crawler/movies.json", "r", encoding="utf-8") as f:
    data = json.load(f)
movies = data["movies"]
ratings = [m["rating"] for m in movies]

# 直方图 bins=5 蓝色
plt.hist(ratings, bins=5, color="blue")
plt.title("评分分布")
plt.xlabel("评分")
plt.tight_layout()

plt.savefig("q4_3a_hist.png", dpi=150)
plt.show()