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Xlsx

Skill woodfishhhh/EZ_math_model/skills/ez-math-model/tools/xlsx

专攻数学建模的下一代自动化SKIILS

Install
npx -y skills add woodfishhhh/EZ_math_model --skill xlsx

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What its author says it does

Copied from the file, not written here

Use when EZ_math_model needs to read, preview, clean, write, or summarize CSV, XLS, or XLSX attachments and result tables for modeling tasks.

SKILL.md

1.6 KB, as published. Nobody here has run it

xlsx — 表格数据读写

何时使用

  • 读取 .xlsx.xls.csv 附件。
  • 写出 results/qN_summary.csv.xlsx
  • 生成 intake.json.attachments[i].preview
  • 大 CSV 需要分块处理。

预览契约

输出到 intake preview:

{
  "shape": [1024, 8],
  "columns": ["timestamp", "value"],
  "head_3": [{"timestamp": "2024-01-01", "value": 12.3}],
  "missing_per_col": {"value": 5}
}

优先链路

  1. pandas 读写和清洗。
  2. openpyxl 写公式或保留 Excel 格式。
  3. 宿主 xlsx skill 处理公式刷新、LibreOffice 重算等高级场景。

pandas 模板

import pandas as pd

df = pd.read_excel("attachments/data.xlsx")
preview = {
    "shape": list(df.shape),
    "columns": df.columns.tolist(),
    "head_3": df.head(3).to_dict("records"),
    "missing_per_col": {c: int(n) for c, n in df.isna().sum().items() if n > 0},
}
df.to_csv("results/q1_summary.csv", index=False, encoding="utf-8")

CSV 编码尝试顺序:utf-8gbkgb2312latin-1

大文件协议

  • pd.read_csv(path, chunksize=200_000)
  • 提前指定 dtype
  • 必要时抽样 5% 做 EDA。
  • 处理完及时释放分块 DataFrame。

失败诊断

情况处理
编码全失败写诊断,建议用户提供 utf-8 版
列名含非法字符生成 ASCII 安全别名并保留 column_alias.json
文件超过 1GBchunksize 分块处理

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