CODEWITHSUNDEEP
pythonjupyter-notebookipythonipywidgets
appleivanko
appleivanko

Reputation: 31

`ipywidgets.interact` shows the widget itself but does not apply the function in the argument (Jupyter Notebook)

I have a problem that interactive objects from ipywidgets do not work in Jupyter Notebook on my computer. The widget itself is displayed but the function that it should control (e.g. drawing graph with changing parameter), seemingly, does not run. I took example from documentation and it does not work.

The picture of code and output

Code:

import ipywidgets
import widgetsnbextension

def greeting(text="World"):
    print("Hello {}".format(text))
ipywidgets.interact(greeting, text="IPython Widgets")

What have I already tried:

  1. There were similar questions, like this but the answer didn't work for me (the answer was to run this: jupyter nbextension enable --py widgetsnbextension).
  2. The code above works in GoogleColab so I tried to install their versions of packages ipython and ipykernel (packages ipywidgets and widgetsnbextensions were of the same version as mine). But it has led to errors so I have given up this idea. I have the latest versions of all packages now and I don't have Anaconda.

What should I try next? May be I am wrong and the problem has a different cause?

Upvotes: 1

Views: 1840

Answers (1)

appleivanko
appleivanko

Reputation: 31

I found the answer!!!

I have had several nbextensions switched on (see screenshot). This was my mistake to include everything which seemed useful. When I turned off all nbextensions then all ipywidgets stuff started to work. Finally, I found that one particular extension called Limit Output is to be blamed for. Turn it off and all works fine.

The moral: don't use everything if you don't need it. Also, obviously, there is a bug in Limit Output extension because it is not supposed to affect widgets (it is supposed to limit output data when you accidentally write while(true) or something like that).

You can read some useful stuff about SageMath in the comments under the original question as well.

Upvotes: 2

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