import numpy as np
import holoviews as hv
from holoviews import opts
hv.extension('bokeh')

hv.BoxWhisker(np.random.randn(1000), vdims='Value')

groups = [chr(65+g) for g in np.random.randint(0, 3, 200)]
boxwhisker = hv.BoxWhisker((groups, np.random.randint(0, 5, 200), np.random.randn(200)),
              ['Group', 'Category'], 'Value').sort()
boxwhisker.opts(
    opts.BoxWhisker(box_color='white', height=400, show_legend=False, whisker_color='gray', width=600))