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"]

dur = [i["duration"] for i in movies]
plt.hist(dur,edgecolor="black")
plt.xlabel("时长（分钟）")
plt.savefig("q4_3b_hist.png",dpi=150)
plt.close()