Archived discussions · Captured October 28, 2026

Best way to implement a callback besides the javascript coding

arashagaJun 01, 2015 #1

I was trying to update two lines based on the information I get from the first line and calculate some optimal points and construct the second line. I wanted to to know if there are any methods that I can use within bokeh that I could use to create a callback to do the job.

In the following code I have implemented the callback for the first line but I I need to somehow call a second function once there is a change on the line to modify the second line, since the callback code is done in the javascript code I need to call a python function after that call back and pass the data to the second line. I would appreciate any help.

gist.github.com

https://gist.github.com/arashaga/a99934b0aa54feef938e

test.py

from __future__ import division
from src.optimization import tangency
from bokeh.io import vform
from bokeh.plotting import figure, output_file, show
from bokeh.models import *
from numpy import *


def cobbDouglas_points(xs,px,py,z):
    y =[]

This file has been truncated. show original

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BryanJun 04, 2015 #2

There's no way to call python functions from JS callbacks. If you need to call python code for your interactions, the only option is to use the Bokeh Server. You can see a server example that updates data when a slider is changed here:

https://github.com/bokeh/bokeh/blob/master/examples/app/sliders_applet/sliders_app.py

Thanks,

Bryan

···

On Jun 1, 2015, at 9:13 AM, arashaga@gmail.com wrote:

I was trying to update two lines based on the information I get from the first line and calculate some optimal points and construct the second line. I wanted to to know if there are any methods that I can use within bokeh that I could use to create a callback to do the job.

In the following code I have implemented the callback for the first line but I I need to somehow call a second function once there is a change on the line to modify the second line, since the callback code is done in the javascript code I need to call a python function after that call back and pass the data to the second line. I would appreciate any help.

test.py · GitHub

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arashagaJun 04, 2015 #3

Thanks Bryan!

···

On Wednesday, June 3, 2015 at 10:27:49 PM UTC-5, Bryan Van de ven wrote:

There’s no way to call python functions from JS callbacks. If you need to call python code for your interactions, the only option is to use the Bokeh Server. You can see a server example that updates data when a slider is changed here:
    [https://github.com/bokeh/bokeh/blob/master/examples/app/sliders_applet/sliders_app.py](https://github.com/bokeh/bokeh/blob/master/examples/app/sliders_applet/sliders_app.py)
Thanks,

Bryan

On Jun 1, 2015, at 9:13 AM, aras...@gmail.com wrote:

I was trying to update two lines based on the information I get from the first line and calculate some optimal points and construct the second line. I wanted to to know if there are any methods that I can use within bokeh that I could use to create a callback to do the job.

In the following code I have implemented the callback for the first line but I I need to somehow call a second function once there is a change on the line to modify the second line, since the callback code is done in the javascript code I need to call a python function after that call back and pass the data to the second line. I would appreciate any help.

https://gist.github.com/arashaga/a99934b0aa54feef938e

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systemJul 21, 2021 #4

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