import streamlit as st

st.session_state

init as a empty dict, used to store all the self-defined state

st.session_state.{name} = []

st.sidebar

• st.sidebar.header(“Sidebar title”)
• item = st.sidebar.selectbox(“choose:”, st.session_state.list)
  • treat st.session_state.list as select items
  • return the selected item

st.sidebar.text_input

with

use with without as give context to code, similar to Go syntax

with st.chat_message("AI")
    st.markdown(message.content)

is same as:

st.chat_message.markdwon(message.content)