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excel-smart-analysis-and-cleaning

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对多 Sheet Excel 进行智能清洗、跨表核对与可视化分析。。

skills/sn-da-excel-workflow/capability/excel-data-cleaning/missing-value-handling/SKILL.md

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Nov 3, 2026
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Step1 对数据进行深度清洗，包括合并单元格填充（ffill）、正则化文本处理、RGB 颜色分量转换以及异常值识别。
```python
import re

def clean_data(df, target_col):
    # 1. 处理合并单元格：向下填充
    df[target_col] = df[target_col].ffill()
    
    # 2. 正则清洗：去除数字前缀、特殊字符及首尾空格
    def regex_clean(text):
        if not isinstance(text, str): return text
        text = re.sub(r'^\d+[\.\s\-]+', '', text) # 去除如 "1. " 的前缀
        text = re.sub(r'[^\u4e00-\u9fa5a-zA-Z0-9]', '', text) # 仅保留中英数
        return text.strip()
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