Avoid fading output during longer background activity

[w-markus]

following up on this:

what I did in my script was, that I separated calculation/data acquisition tasks, work(), from the stuff that does the displaying via streamlit, ui(). The script first runs ẁork() followed by ui(). What I observed, was that work() blocked part of streamlit activity which resulted in grayed-out widgets.

However, I now simply reversed the sequence, i.e. first ui() and than work(), which leads to better displaying performance. It might be necessary to do a st.experimental_rerun(), though, to update things in the UI.

Another solution is the use of asynchronous routines via asyncio as describe in this discussion:

Issue with asyncio run in streamlit

Hi guys ! I was trying to get something with a stream working in streamlit. ( no pun intended ) I tried a couple of approaches with threading and finished my search on asyncio.run with a small coroutine and for the most part it works really well. No need for any fancy code just a asyncio.run at the end. But there’s a small problem, I am seeing None printed at every run of loop. Any idea what might be causing this ? This is my script I am using to show a simple clock import asyncio import st…

I am still wondering, what’s the speediest way to display 2D/image data using streamlit.

Best wishes
Markus