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invalid-data-cleaning

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用于大规模Excel数据的预处理，通过统计总行数判断是否转换为Parquet格式以提升读写效率，并使用正则表达式清洗指定文本列（如仅保留中文字符），最后导出清洗后的文件并提供下载链接。

skills/sn-da-excel-workflow/capability/excel-data-cleaning/invalid-data-cleaning/SKILL.md

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# Invalid_Data_Cleaning

> This sub-skill covers one capability of the Excel workflow. For reading/counting/Parquet optimization, see the parent workflow SKILL.md.

## Skill Steps

Step1 根据总行数判断是否数据量过大，若满足条件，则将 Excel 文件转换为 Parquet 格式提升读写效率，再读取数据进行后续分析。
```python
import pandas as pd

file_path = "input_data.xlsx"
parquet_path = "temp_data.parquet"

# 读取 Excel 文件并转换为 Parquet 格式
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