from datetime import datetime as dt
import time
from bokeh.sampledata.daylight import daylight_warsaw_2013
from bokeh.plotting import figure, show, output_file
from bokeh.models import Span
output_file("span.html", title="span.py example")
p = figure(x_axis_type="datetime", y_axis_type="datetime")
p.line(daylight_warsaw_2013.Date, daylight_warsaw_2013.Sunset,
line_dash='solid', line_width=2, legend_label="Sunset")
p.line(daylight_warsaw_2013.Date, daylight_warsaw_2013.Sunrise,
line_dash='dotted', line_width=2, legend_label="Sunrise")
start_date = time.mktime(dt(2013, 3, 31, 2, 0, 0).timetuple())*1000
daylight_savings_start = Span(location=start_date,
dimension='height', line_color='green',
line_dash='dashed', line_width=3)
p.add_layout(daylight_savings_start)
end_date = time.mktime(dt(2013, 10, 27, 3, 0, 0).timetuple())*1000
daylight_savings_end = Span(location=end_date,
dimension='height', line_color='red',
line_dash='dashed', line_width=3)
p.add_layout(daylight_savings_end)
p.title.text = "2013 Sunrise and Sunset times in Warsaw"
p.yaxis.axis_label = 'Time of Day'
show(p)
References
http://docs.bokeh.org/en/latest/docs/user_guide/annotations.html#spans
https://stackoverflow.com/questions/39426976/how-to-add-horizontal-line-span-to-the-box-plot-in-bokeh
https://stackoverflow.com/questions/28797330/infinite-horizontal-line-in-bokeh