np.random.seed(1234)  # doctest: +SKIP
df = pd.DataFrame(np.random.randn(10, 4),  # doctest: +SKIP
                  columns=['Col1', 'Col2', 'Col3', 'Col4'])
boxplot = df.boxplot(column=['Col1', 'Col2', 'Col3'])  # doctest: +SKIP