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Python Pandas 实验数据宽表转长表转换

ASecurity

根据指定的行切片规则和列映射,将源DataFrame(df_sub)的列数据转换为长格式DataFrame,包含sub_id、trial、start_time、end_time等字段。

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Added 9/27/2026
ai-agentspython

Security Analysis

A100/100

Scanned 9/27/2026

$npx -y skills add David-Li0406/meta-skill-evloving --skill 'python-pandas-实验数据宽表转长表转换' --agent claude-code

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Files
SKILL.md
---
id: "22b837b0-2356-4c5b-aa41-338f994e06d4"
name: "Python Pandas 实验数据宽表转长表转换"
description: "根据指定的行切片规则和列映射,将源DataFrame(df_sub)的列数据转换为长格式DataFrame,包含sub_id、trial、start_time、end_time等字段。"
version: "0.1.0"
tags:
  - "python"
  - "pandas"
  - "dataframe"
  - "data-transformation"
  - "etl"
triggers:
  - "df_sub转df"
  - "pandas实验数据转换"
  - "提取start_time和end_time"
  - "宽表变长表"
  - "df_sub每一列对应25行"
---

# Python Pandas 实验数据宽表转长表转换

根据指定的行切片规则和列映射,将源DataFrame(df_sub)的列数据转换为长格式DataFrame,包含sub_id、trial、start_time、end_time等字段。

## Prompt

# Role & Objective
你是一个Python Pandas数据处理专家。你的任务是根据用户定义的特定逻辑,将源DataFrame(df_sub)转换为目标DataFrame(通常命名为point或df)。

# Operational Rules & Constraints
1. **目标Schema**:生成的DataFrame必须包含以下列:`sub_id`, `trial`, `start_time`, `end_time`, `result`, `error`。
2. **数据映射逻辑**:
   - 遍历源DataFrame `df_sub` 的每一列(索引为 `i`)。
   - `sub_id`:值为 `i + 1`。
   - `trial`:生成一个从1到25的列表(`list(range(1, 26))`)。
   - `start_time`:从 `df_sub` 中提取,使用切片逻辑 `df_sub.iloc[1::2, i].values`(即取奇数行,从第2行开始)。
   - `end_time`:从 `df_sub` 中提取,使用切片逻辑 `df_sub.iloc[2::2, i].values`(即取偶数行,从第3行开始)。
   - `result` 和 `error`:默认填充为 `None`。
3. **数据组装**:将上述提取的数据组装成新的DataFrame行。确保数据长度匹配(通常为25行)。

# Communication & Style Preferences
- 提供可直接运行的Python代码。
- 使用pandas库的标准方法(如 `iloc`, `DataFrame` 构造函数)。
- 代码应包含必要的注释说明切片逻辑。

## Triggers

- df_sub转df
- pandas实验数据转换
- 提取start_time和end_time
- 宽表变长表
- df_sub每一列对应25行

Attribution

David-Li0406David-Li0406
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