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@the-moog
Last active February 2, 2023 12:30
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@the-moog
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the-moog commented Jan 5, 2020

I think this is emulating what the Python 3 Asyncio module does, I'll try and write a version that uses that instead

@sapristi
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sapristi commented Oct 21, 2020

Thank you for this ! Only snippet that I managed to achieve what I wanted to do with !

@Ivorforce
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Ivorforce commented Dec 11, 2020

For anyone seeking a more minimalized, technical example:

import threading
from IPython.display import display
import ipywidgets as widgets
import time
from zmq.eventloop.ioloop import IOLoop

progress = widgets.FloatProgress(value=0, min=0, max=10)
display(progress)

def run(progress, ioloop):
    def update_progress(i, progress=progress):
        progress.value = i

    for i in range(10):
        time.sleep(1)
        ioloop.add_callback(update_progress, i)

def run_progress(*args, **kwargs):
    thread = threading.Thread(target=run, args=(progress, IOLoop.instance()))
    thread.start()

button = widgets.Button(description="Start")
button.on_click(run_progress)
display(button)

@sapristi
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sapristi commented Dec 12, 2020

Also I suggest importing IOLoop directly from tornado, since that's what's used by jupyter, and there's no need to install zmq to get it.

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