Hi,
Almost all of the work in Bokeh is not done in Python, it is almost all done in the Javascript library BokehJS. Defining a Custom Model has two required parts, the Python description, and the JavaScript implementation. You have not supplied an implementation for your custom model. There is an entire chapter in the User’s Guide on creating custom extensions complete with several fully worked examples that you can refer to:
[https://bokeh.pydata.org/en/1.0.2/docs/user_guide/extensions.html](https://bokeh.pydata.org/en/1.0.2/docs/user_guide/extensions.html)
Thanks,
Bryan
On Dec 4, 2018, at 02:39, Madalin Fasie madalin.bogdan21@gmail.com wrote:
Hi,
I am trying to make my own custom tool and I keep getting
Error: Model ‘Custom’ does not exist. This could be due to a widget
or a custom model not being registered before first usage.
So I just assumed that I’m doing something wrong and tried the example from the custom extensions guide and I got the same error message.
Moreover, I tried this with both Bokeh 0.13.0 and 1.0.1 and the issue is still there.
The full code is:
from bokeh.core.properties import String, Instance
from bokeh.models import LayoutDOM, Slider
from bokeh.io import show, output_file
from bokeh.layouts import column
class Custom(LayoutDOM):
text = String(default="Custom text")
slider = Instance(Slider)
slider = Slider(start=0, end=10, step=0.1, value=0, title=“value”)
custom = Custom(text=“Special Slider Display”, slider=slider)
layout = column(slider, custom)
show(layout)
and I run it with:
python custom.py
Am I doing something wrong? Can you point me at least to where should I look?
Thank you,
Madalin
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