How DateRangeSlider in bokeh works?

Question

I have been trying to work with dates in bokeh, but couldn't find a way, then I came across DateRangeSlider in bokeh but donot know the syntax how to initialze and use it. I need help in the working of DateRangeSlider in bokeh! Need Examples with code.

Answer 1

from datetime import date

from bokeh.models.widgets import DateRangeSlider
from bokeh.layouts import layout

from bokeh.io import curdoc

date_range_slider = DateRangeSlider(title="Date Range: ", start=date(2017, 1, 1), end=date.today(), value=(date(2017, 9, 7), date(2017, 10, 15)), step=1)


l = layout(children=[[date_range_slider]], sizing_mode='fixed')
curdoc().add_root(l)
curdoc().title = "DateRangeSlider Example"

This should create a date range slider from Jan 1st 2017 to today (17th Oct 2017, in this case)

Below are the screenshots of this example:

Date Range Slider with the chosen default range

Date Range Slider with full range

For some reason, the start date sets to 01/01/2016 even though the specified value is 01/01/2017. When I set it to 2nd Jan, the year changes to 2017. I guess this is a bug.

EDIT: Works as expected in the latest version of bokeh.