Python Pandas Dataframe merge and pick only few columns
result = pd.merge(left, right[['key1','key2','C']], on=['key1', 'key2'])OR
right.merge(left, on=['key1','key2'])[['A','B','C','key1','key2']]
result = pd.merge(left, right[['key1','key2','C']], on=['key1', 'key2'])OR
right.merge(left, on=['key1','key2'])[['A','B','C','key1','key2']]