Pandas groupby two columns and plot

Question

I have a dataframe like this:

import numpy as np
import pandas as pd
import matplotlib.pyplot as plt
%matplotlib inline

df = pd.DataFrame({\'category\': lis         


        

Answer 1

You can also use this

pd.pivot_table(df, values = 'B', index = 'category', columns = 'sex',
               aggfunc = lambda x: len(x)).plot.bar()

which results in exactly the same plot.