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 multiple dataframes
import pandas as pd
from functools import reduce
# compile the list of dataframes you want to merge
data_frames = [df1, df2, df3]
df_merged = reduce(lambda left,right: pd.merge(left,right,on=['key_col'],
how='outer'), data_frames)Copyright © 2021 Codeinu
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