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q4/q4_3a/q4_3a.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)
+
+ratings = [m['rating'] for m in movies]
+
+plt.figure()
+plt.hist(ratings, bins=5, color='blue')
+plt.title("评分分布")
+plt.xlabel("评分")
+plt.savefig('q4_3a_hist.png', dpi=150)