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q4/q4_2/q4_2.py

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+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)