Python exec(script, globals()) not showing GUI (iPyWidgets)

Question

Hello my fellow programmers,

I want to include a script from another file that creates a UI with iPyWidgets. The problem is that the code will execute but nothing is shown. I am using Jupyterhub to display the button. When I run the code on itself, the button is showing.

button_code.py

from ipywidgets import widgets
from IPython.display import display
from IPython.display import clear_output
from ipywidgets import Button, HBox, VBox, Layout, Button, Text, Textarea

widgets.Button(description = 'clear',
layout=Layout(width='20%', height='100%'))

call_button_script.py

import os
def call_script():

    script_dir = os.path.dirname(os.path.abspath(__file__))
    script_fqn = os.path.join(script_dir, 'button_code.py')
    script = open(script_fqn).read()

    exec(script, globals())

The code is executed via the following import:

from call_button_script import call_script
call_script()

Am I missing something crucial or is there another possible mistake?

Thank you for your time.

can you provide testUI.py ? it seems your using that file instead of button_code.py — steviestickman, Jan 17 '20 at 12:05
sorry I changed the name while asking this question. testUI.py is button_code.py — Derek Haynes, Jan 17 '20 at 12:15
Because the real code is much longer with many functions. It was developed over time and is not really maintainable. It has been taken directly from a JupyterHub Script — Derek Haynes, Jan 17 '20 at 14:52

score 0 · Answer 1 · answered Jan 19 '20 at 03:47

0

Is your from call_button_script import call_script call_script() in the same directory ? did you've seen the output on the console

answered Jan 19 '20 at 03:47

amalcodes

43
5

Yes I can see output on the console when doing a print statement for example. Just the widget will not show. Also when I return the widget I have no possibility to let it display – Derek Haynes Jan 19 '20 at 08:24

score 0 · Answer 2 · answered Jan 20 '20 at 15:52

0

The answer was to just import the whole file. I´ve put it in a class and initialized it all in the init

The GUI wasn´t showing because it was missing display() in the code

answered Jan 20 '20 at 15:52

Derek Haynes

125
1
2
13

Python exec(script, globals()) not showing GUI (iPyWidgets)

2 Answers2