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From: =?UTF-8?q?=E5=90=B4=E5=AE=87=E6=99=A8?=
 <2509165026@student.example.com>
Date: Sun, 5 Jul 2026 18:21:08 +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=5F3a?=
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---
 q4/q4_3a/q4_3a.py | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
 create mode 100644 q4/q4_3a/q4_3a.py

diff --git a/q4/q4_3a/q4_3a.py b/q4/q4_3a/q4_3a.py
new file mode 100644
index 0000000..ff6357c
--- /dev/null
+++ b/q4/q4_3a/q4_3a.py
@@ -0,0 +1,14 @@
+import json
+import matplotlib.pyplot as plt
+
+movies = json.load(open('movies.json', encoding='utf-8'))['movies']
+# print(movies)
+ratings = []
+durations = []
+for m in movies:
+    ratings.append(m['rating'])
+    durations.append(m['duration'])
+
+plt.figure(figsize=(8,5))
+plt.hist(ratings, bins=5,color='blue')
+plt.savefig('q4_3a_hist.png',dpi=150)