From 0e328f76a1b0a5e9b5d9dae7de7ad26c8bd4f12a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=BB=84=E6=A5=A0=E6=A5=A0?=
 <2509165032@student.example.com>
Date: Tue, 23 Jun 2026 11:14:15 +0800
Subject: [PATCH] =?UTF-8?q?=E4=B8=8A=E4=BC=A0=E6=96=87=E4=BB=B6=E8=87=B3?=
 =?UTF-8?q?=20q4/q4=5F3b?=
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---
 q4/q4_3b/q4_4.py | 12 ++++++++++++
 1 file changed, 12 insertions(+)
 create mode 100644 q4/q4_3b/q4_4.py

diff --git a/q4/q4_3b/q4_4.py b/q4/q4_3b/q4_4.py
new file mode 100644
index 0000000..7ad6650
--- /dev/null
+++ b/q4/q4_3b/q4_4.py
@@ -0,0 +1,12 @@
+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()
\ No newline at end of file