I am building a dashboard for a JSON REST API and I wanted to get a list of elements from the server, visualize it in a table, then interact with it.
I modified Bokeh Data Table Example to use an AjaxDataSource instead of a ColumnDataSource.
The resulting code is this:
from datetime import date
from random import randint
from bokeh.models import AjaxDataSource
from bokeh.models.widgets import DataTable, DateFormatter, TableColumn
from bokeh.models.layouts import WidgetBox
from bokeh.plotting import show
source=AjaxDataSource(data_url="http://127.0.0.1:8000/dates", polling_interval=200)
#############
# Create data dict for the source, could be empty, filled with random data for testing
#############
source.data=dict( dates=[date(2017, 2, i+1) for i in range(10)],
downloads=[randint(0, 100) for i in range(10)])
columns = [
TableColumn(field="dates", title="Date", formatter=DateFormatter()),
TableColumn(field="downloads", title="Downloads"),
]
data_table = DataTable(source=source, columns=columns, width=400, height=280)
show(WidgetBox(data_table))
Unfortunately, the server is not contacted at all and the table still shows the sample data I filled in to see what happened.
If I use a plot with an AjaxDataSource, instead, it's updating properly, contacting the server every polling interval
