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README.md
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# tutorial
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python & pandas 's tutorial
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+#### tasks
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+1. 合并test1.xlsx, test2.xlsx的文件(使用pd.concat函数)
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+2. 去重,只保留不重复的记录(使用pd.drop_duplicates函数)
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+3. 按照年龄升序排序
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data/test2.xlsx
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