Calculate Arbitrary Percentile on Pandas GroupBy

Question

Currently there is a median method on the Pandas\'s GroupBy objects.

Is there is a way to calculate an arbitrary percentile (s

Answer 1

With pandas >= 0.25.0 you can also use Named aggregation

An example would be

import numpy
import pandas as pd
df = pd.DataFrame({'A': numpy.random.randint(1,3,size=100),'C': numpy.random.randn(100)})
df.groupby('A').agg(min_val = ('C','min'), percentile_80 = ('C',lambda x: x.quantile(0.8)))