python: left join
new_df = df_1.merge(df_2, on='id', how='left', indicator=True)python: left join
new_df = df_1.merge(df_2, on='id', how='left', indicator=True)pandas merge python
import pandas as pd
df1 = pd.DataFrame({'lkey': ['foo', 'bar', 'baz', 'foo'],
'value': [1, 2, 3, 5]})
df2 = pd.DataFrame({'rkey': ['foo', 'bar', 'baz', 'foo'],
'value': [5, 6, 7, 8]})
df1.merge(df2, left_on='lkey', right_on='rkey')Copyright © 2021 Codeinu
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