41 lines
1.1 KiB
Python
41 lines
1.1 KiB
Python
# q4_1.py
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import json
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import matplotlib.pyplot as plt
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# 1. 读取books.json文件
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with open("books.json", "r", encoding="utf-8") as f:
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data = json.load(f)
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books = data["books"]
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# 2. 统计各出版社图书数量
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pub_count = {}
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for book in books:
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pub_name = book["publisher"]
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if pub_name in pub_count:
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pub_count[pub_name] += 1
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else:
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pub_count[pub_name] = 1
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# 拆分x轴、y轴数据
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publish_names = list(pub_count.keys())
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book_nums = list(pub_count.values())
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# 3. 配置画布与绘图
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plt.figure(figsize=(10, 6))
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# 生成不同颜色
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colors = plt.cm.tab10(range(len(publishing_names)))
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# 绘制柱状图
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plt.bar(publishing_names, book_nums, color=colors)
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# 4. 图表样式设置
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plt.title("出版社图书数量分布", fontsize=14)
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plt.xlabel("出版社名称", fontsize=12)
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plt.ylabel("图书数量", fontsize=12)
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# X轴文字旋转45度防止重叠
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plt.xticks(rotation=45, ha="right")
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# 自动调整布局，避免标签被截断
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plt.tight_layout()
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# 5. 保存图片
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plt.savefig("q4_1_bar.png", dpi=150)
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plt.show() |