import numpy as np
from bokeh.plotting import figure, show
from bokeh.io import output_notebook
from bokeh.models import ColumnDataSource
# Direct output to this notebook
output_notebook()

n = 100
x = np.random.random(size=n) * 100
y = np.random.random(size=n) * 100
source = ColumnDataSource(data=dict(x=x, y=y))

figkwds = dict(plot_width=400, plot_height=300, webgl=True,
           tools="pan,lasso_select,box_select,help",
           active_drag="lasso_select")

p1 = figure(**figkwds)
p1.scatter('x', 'y', source=source, alpha=0.8)

show(p1)