Streamlitにおけるページ遷移、画面リフレッシュ

出典１：ページ切替

 

 

 

出典２：ページ間データ保持

 

出典３：画面リフレッシュ（リロード）

streamlit_autorefresh

■Parameters
interval: int
    Amount of time in milliseconds to 
limit: int or None
    Amount of refreshes to allow. If none, it will refresh infinitely.
    While infinite refreshes sounds nice, it will continue to utilize
    computing resources.
debounce: boolean
    Whether to delay the autorefresh when user interaction occurs.
    Defaults to True in order to avoid refreshes interfering with
    interaction effects on scripts.
key: str or None
    An optional key that uniquely identifies this component. If this is
    None, and the component's arguments are changed, the component will
    be re-mounted in the Streamlit frontend and lose its current state.
■インストール
pip install streamlit-autorefresh
■サンプルコード
import streamlit as st
from streamlit_autorefresh import st_autorefresh

# Run the autorefresh about every 2000 milliseconds (2 seconds) and stop
# after it's been refreshed 100 times.
count = st_autorefresh(interval=2000, limit=100, key="fizzbuzzcounter")

# The function returns a counter for number of refreshes. This allows the
# ability to make special requests at different intervals based on the count
if count == 0:
    st.write("Count is zero")
elif count % 3 == 0 and count % 5 == 0:
    st.write("FizzBuzz")
elif count % 3 == 0:
    st.write("Fizz")
elif count % 5 == 0:
    st.write("Buzz")
else:
    st.write(f"Count: {count}")
■考察
　　count = st_autorefresh(interval=10, limit=1)
とすればワンショットの画面更新になるが、フォームのなかの入力値がクリアされない。
フォームの中のクリアはこちら↓