From ffbe5b339a094b63082a48a406396a3923cbc5fc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=83=AD=E5=AE=87=E6=B6=B5?=
 <2509165016@student.example.com>
Date: Sun, 5 Jul 2026 18:38:50 +0800
Subject: [PATCH] =?UTF-8?q?=E6=B7=BB=E5=8A=A0=20=E6=97=B6=E9=95=BF?=
 =?UTF-8?q?=E7=9B=B4=E6=96=B9=E5=9B=BEq4=5F3b.py?=
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---
 时长直方图q4_3b.py | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
 create mode 100644 时长直方图q4_3b.py

diff --git a/时长直方图q4_3b.py b/时长直方图q4_3b.py
new file mode 100644
index 0000000..f27de84
--- /dev/null
+++ b/时长直方图q4_3b.py
@@ -0,0 +1,17 @@
+# q4/q4_3b/q4_3b.py
+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"]
+durations = [m["duration"] for m in movies]
+
+# 直方图 bins=5 绿色
+plt.hist(durations, bins=5, color="green")
+plt.title("时长分布")
+plt.xlabel("时长（分钟）")
+plt.tight_layout()
+
+plt.savefig("q4_3b_hist.png", dpi=150)
+plt.show()
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