import numpy as np
from bokeh.plotting import figure, show
x = np.linspace(0, 4*np.pi, 100)
y = np.sin(x)
p = figure()
p.circle(x, y, legend_label="sin(x)")
p.line(x, y, legend_label="sin(x)")
p.line(x, 2*y, legend_label="2*sin(x)",
line_dash=[4, 4], line_color="orange", line_width=2)
p.square(x, 3*y, legend_label="3*sin(x)", fill_color=None, line_color="green")
p.line(x, 3*y, legend_label="3*sin(x)", line_color="green")
# 3*sin(x) curve should be under this legend at initial viewing, so
# we can see that the legend is transparent
p.legend.location = "bottom_right"
p.legend.background_fill_color = "navy"
p.legend.background_fill_alpha = 0.5
show(p)