take union of two dataframes pandas

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Cavan
25 Oct 2020
1pd.concat([df1, df2])
2
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Jerónimo
16 Oct 2016
1m = {'left_only': 'df1', 'right_only': 'df2', 'both': 'df1, df2'}
2
3result = df1.merge(df2, on=['A'], how='outer', indicator='B')
4result['B'] = result['B'].map(m)
5
6result
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