Is that a way to overwrite or clear user input value ?
For example:
col3, col4 = st.columns(2)
with col3:
start_time = st.text_input('DĂ©but', placeholder="0:00")
with col4:
end_time = st.text_input('Fin', placeholder="0:00")
st.write("---")
if st.button('Extraire texte'):
with st.spinner('En cours...'):
# Add new text input, don't change
start_time = st.text_input('DĂ©but', value=datetime.now())
time.sleep(5)
# Add new text input, don't change
end_time = st.text_input('Fin', value=datetime.now())
Thanks in advance
When you assign a key to a widget, you can programmatically control the widgetâs value through Session State.
st.text_input("Your name", key="name")
can be updated by modifying st.session_state.name
. (Make sure any manual value assignment happens before the widget function in the script or within a callback. You canât modify a widgetâs value after the widget function is already complete in that script run.)
(Perhaps I should add an example of programmatic control to the Widget behavior guide. Thereâs some related examples but not exactly the one Iâd point to in this case. )
col3, col4 = st.columns(2)
with col3:
st.text_input('DĂ©but', key="start_time", placeholder="0:00")
with col4:
st.text_input('Fin', key="end_time", placeholder="0:00")
st.write("---")
if st.button('Extraire texte'):
with st.spinner('En cours...'):
st.session_state.start_time = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
time.sleep(5)
st.session_state.end_time = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
I got this error:
StreamlitAPIException: st.session_state.start_time cannot be modified after the widget with key start_time is instantiated.
Traceback:
File "C:\Dev\Python\VideoToText\app_streamlit.py", line 74, in <module>
main()
File "C:\Dev\Python\VideoToText\app_streamlit.py", line 64, in main
st.session_state.start_time = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
Yes. Thatâs expected. You canât modify the value assigned to a widget after you call the widget function. It has to be before.
So try reversing the button and your columns:
# Initialize your columns first, which keeps that content visually above your button on the page
col3, col4 = st.columns(2)
# Call your functions that change the `st.text_input` values before the widget functions
if st.button('Extraire texte'):
with st.spinner('En cours...'):
st.session_state.start_time = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
time.sleep(5)
st.session_state.end_time = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
# Call the widgets with changed values at the end
with col3:
st.text_input('DĂ©but', key="start_time", placeholder="0:00")
with col4:
st.text_input('Fin', key="end_time", placeholder="0:00")
st.write("---")
Iâm not exactly sure what logic youâre going for here, so there may be other methods more appropriate to your situation. In my case, I most often do widget manipulation within callback functions rather than in the main body of the script.
OK. Thanks for your help. I start with Streamlit.
I want to display the execution time of a process with the start and end time.
Do you have an example within callback functions?
Do you need the start and stop time to be an interactive widget instead of just text displayed on the screen? If your primary purpose is to report values, Iâd suggest st.markdown
instead.
For reference, a callback would look something like this:
import streamlit as st
import time
from datetime import datetime
if "start" not in st.session_state:
st.session_state.start = ""
st.session_state.stop = ""
def update():
st.session_state.start = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
time.sleep(5)
st.session_state.stop = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
st.text_input("A", key="start")
st.text_input("B", key="stop")
st.button("Go", on_click=update)
@mathcatsand Thank you again for your support, it helped me a lot.
Below is my python code. Any suggestions are welcome
import os
import time
from datetime import datetime, timedelta
import streamlit as st
import yt_dlp
def upload_file(filename, upload_folder):
file_source = os.path.join(upload_folder, filename.name)
os.makedirs(upload_folder, exist_ok=True)
with open(file_source, 'wb') as out:
out.write(filename.getbuffer())
out.close()
return file_source
def download_video(video_path):
with yt_dlp.YoutubeDL({'extract_audio': True, 'format': 'bestaudio', 'outtmpl': '%(id)s.%(ext)s'}) as ydl:
info_dict = ydl.extract_info(video_path, download=True)
audio_file = ydl.prepare_filename(info_dict)
return audio_file
def transcript():
st.session_state.start_time = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
with st.spinner('En cours...'):
time.sleep(5) # DO SOMETHING
st.session_state.end_time = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
st.session_state.time_elapse = str(datetime.strptime(st.session_state.end_time, "%Y-%m-%d %H:%M:%S") - datetime.strptime(st.session_state.start_time, "%Y-%m-%d %H:%M:%S"))
def main():
st.title("Extraire le texte d'une vidéo")
st.subheader('Options :')
col1, col2 = st.columns(2)
with col1:
uploaded_file = st.file_uploader("Choisissez un fichier")
with col2:
video_url = st.text_input("Ou entrez l'URL de la vidéo à télécharger")
st.write("---")
if uploaded_file or video_url:
if "start_time" not in st.session_state:
st.session_state.start_time = "0:00"
st.session_state.end_time = "0:00"
st.session_state.time_elapse = "0:00"
if uploaded_file :
file_source = upload_file(uploaded_file, 'video_uploads')
elif video_url:
file_source = download_video(video_url)
col3, col4, col5 = st.columns(3)
with col3:
st.text_input('DĂ©but', key="start_time")
with col4:
st.text_input('Fin', key="end_time")
with col5:
st.text_input('Temps de traitement', key="time_elapse")
st.write("---")
st.button('Extraire texte', on_click=transcript)
if __name__ == '__main__':
main()
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