import json
import matplotlib.pyplot as plt

plt.rcParams['font.sans-serif'] = ['SimHei']
plt.rcParams['axes.unicode_minus'] = False

with open('simulated-examination/q2_1_crawler/movies.json', 'r', encoding='utf-8') as f:
    movies = json.load(f)

durations = [m['duration'] for m in movies]
ratings = [m['rating'] for m in movies]

plt.figure()
plt.scatter(durations, ratings, c='red', alpha=0.6)
plt.title("时长与评分关系散点图")
plt.xlabel("时长（分钟）")
plt.ylabel("评分")
plt.savefig('q4_2_scatter.png', dpi=150)