33 lines
744 B
Python
33 lines
744 B
Python
# q4_2.py
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import json
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import matplotlib.pyplot as plt
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# 1. 读取文件
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with open("movies.json", "r", encoding="utf-8") as f:
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data = json.load(f)
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# 2. 安全提取电影列表
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if type(data) is dict and "movies" in data:
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movies = data["movies"]
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else:
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movies = []
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# 3. 准备数据
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x_data = []
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y_data = []
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for item in movies:
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# 这一行彻底防止报错
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if type(item) is dict:
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x_data.append(item["duration"])
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y_data.append(item["rating"])
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# 4. 画图（题目全部要求）
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plt.scatter(x_data, y_data, color="red", alpha=0.6)
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plt.title("时长与评分关系散点图")
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plt.xlabel("时长（分钟）")
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plt.ylabel("评分")
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plt.savefig("q4_2_scatter.png", dpi=150)
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plt.close()
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print("运行成功！") |