Hello,
In a Streamlit app, I need to perform a time expensive operation, which depends on some parameters the user chooses (with sliders).
Because this operation is expensive, I want to do it only when the user click on a button to perform it (and because the operation depends on multiple parameters, the user might want to redo the operation multiple times).
Because there are multiple parameters, I also don’t really want to cache the function and recompute it every time one parameter changes. In this case, if a user wants to change 10 parameters, Streamlit will try to redo the expensive operation every time a slider changes, which will make it super slow.
A simple code to illustrate my idea is the following:
import streamlit as st
x = 0
y = None
def f(x):
"Imagine a time expensive function here"
y = x + 1
return y
compute_button = st.button("Compute y")
if compute_button:
y = f(x)
print(y)
clicked = st.button("Click me")
At the beginning, y is None.
When I click on the compute_button, y is now 1, but as soon as I click on another button (for example cliked), y goes back to None.
And I need to click other buttons after performing the expensive operation.
Do you have any idea or workaround for this?
I saw workarounds using a checkbox instead of a button, but I think it wouldn’t fit my case.
Thanks in advance