from bokeh.plotting import figure, output_file, show
from bokeh.models import Arrow, OpenHead, NormalHead, VeeHead, Label, Plot, Range1d
output_file("arrow_styles.html")
ARROW_HEADS = [OpenHead, NormalHead, VeeHead]
HEIGHT = 35 * len(ARROW_HEADS)
p = Plot(plot_width=120, plot_height=HEIGHT,
x_range=Range1d(0,1), y_range=Range1d(-0.5, len(ARROW_HEADS) - 0.5),
toolbar_location=None, outline_line_color=None, min_border_left=0,
min_border_right=0, min_border_top=0, min_border_bottom=0)
for i, style in enumerate(ARROW_HEADS):
p.add_annotation(Arrow(x_start=0.2, y_start=i, x_end=0.2, y_end=i,
end=style()))
p.add_annotation(Label(x=0.2, x_offset=20, y=i, text=[style.__name__],
text_baseline='middle', text_align='left'))
show(p)
