Overwriting output froma print statement

[payzee_co]

Hi ,
I have a list variable velocity and the code is as follows

velocity = 
for i in velocity:
    #print(i)
    st.write(i)
   time.sleep(4/94)

The output i get is as follows. Is there a way to overwrite it in one line instead of it being printed out in newline

[randyzwitch]

Welcome to the Streamlit community! Please see the below example

While loop workaround

For example, this terminates: import streamlit as st import time x = 0 p = st.empty() while x < 10: p.write(f"Your value is {x}") time.sleep(1) x += 1

[payzee_co]

@While loop workaround

import streamlit as st
import time

x = 0

p = st.empty()

while x < 10:
    p.write(f"Your value is {x}")
    time.sleep(1)
    x += 1

Hi thank you , this is the desired behaiviour , but for my case , it gives an error. I am trying to iterate over the 1D list velocity , does it need to be a certain type for it to work ? The error i get is as follows

ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.all()

[randyzwitch]

If you are trying to iterate over a list, then you wouldn’t use a while loop, but rather you would swap in your for i in velocity iteration. The general concept of using an st.empty() container outside of the loop remains in either situation.