添加 q4-1.py

q4-1.py

@@ -0,0 +1,28 @@
+# q4/q4_1/q4_1.py
+import json
+import matplotlib.pyplot as plt
+
+# 读取电影数据
+with open("../q2_1_crawler/movies.json", "r", encoding="utf-8") as f:
+    data = json.load(f)
+movies = data["movies"]
+
+# 统计类型数量
+genre_dict = {}
+for m in movies:
+    g = m["genre"]
+    genre_dict[g] = genre_dict.get(g, 0) + 1
+
+x = list(genre_dict.keys())
+y = list(genre_dict.values())
+
+# 绘制柱状图
+plt.bar(x, y)
+plt.title("类型电影数量分布")
+plt.xlabel("电影类型")
+plt.ylabel("电影数量")
+plt.tight_layout()  # 防止文字重叠
+
+# 保存图片 dpi=150
+plt.savefig("q4_1_bar.png", dpi=150)
+plt.show()