import numpy as np
from lets_plot import *
LetsPlot.setup_html()
np.random.seed(12)
data = dict(
cond=np.repeat(['A','B'], 200),
rating=np.concatenate((np.random.normal(0, 1, 200), np.random.normal(1, 1.5, 200)))
)
ggplot(data, aes(x='rating', fill='cond')) + ggsize(500, 250) \
+ geom_density(color='dark_green', alpha=.7) + scale_fill_brewer(type='seq')