期末

q4/q4_3b/q4_3b.py

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+import matplotlib.pyplot as plt
+import json
+movies= json.load(open('movies.json',encoding='utf-8'))
+rating=[]
+durations=[]
+for m in movies:
+    durations.append(m['duration'])
+plt.title("时长分布")        
+plt.xlabel("min")      
+plt.figure(figsize=(8,5))
+plt.hist(durations,bins=5,color='green')
+plt.savefig('q4_3b_hist.png',dpi=150)
+