Groupby Agg not working if different partials with same name on the same column #28570

related to #28426 from PR #28428

from functools import partial

import pandas as pd
import numpy as np

quant50 = partial(np.percentile, q=50)
quant70 = partial(np.percentile, q=70)

test = pd.DataFrame({'col1': ['a', 'a', 'b', 'b', 'b'], 'col2': [1,2,3,4,5]})
test.groupby('col1').agg({'col2': [quant50, quant70]})

However, quant50 result is rewritten by quant70, so will get the same output on both columns.

output:

expected output: