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参考
- import pandas as pd
- df=pd.read_csv('test.csv',sep=',',header=None)
- df.columns=['first','second']
- result=df.groupby('first')['seoncd'].unique().reset_index()
- result['second']=result['second'].apply(lambd x: '.join(x))
- result.to_excel('result.xlsx',index=False)
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