multiapp.py

import streamlit as st


class MultiApp:
    def __init__(self):
        self.apps = []

    def add_app(self, title, func):
        self.apps.append({"title": title, "function": func})

    def run(self):
        st.sidebar.header("Navigation")
        app = st.sidebar.radio("", self.apps, format_func=lambda app: app["title"])

        app["function"]()