實時更新streamlit中選擇框的值

Question

如何動態更新streamlit中選擇框的值？

這是一個最小的非工作示例

import streamlit as st
import time
def main():
 st.session_state['choice'] = list(range(2))
 st.selectbox("myoptions", options=st.session_state['choice'])
 while True:
  st.session_state['choice'] = list(range(5))
  time.sleep(2)

我嘗試這樣做的原因是模擬獲取新數據然后更新選項的過程。

實際上，我會每隔一小時左右更新一次選項

Answer 1

這是解決方案：

import streamlit as st
import time
import random
def skeleton():
    left, right = st.columns(2)
    with right:
        numbers = st.empty()
    return left, right, numbers

left, right, numbers = skeleton()
while True:
    with right:
        with numbers.container():
            st.selectbox('food',random.sample(range(10, 40), 4))
            time.sleep(2)