utils.py

import streamlit as st
def switch_page_button(button_text: str, page_name: str):
    """
    Switch page programmatically in a multipage app

    Args:
        page_name (str): Target page name
    """
    from streamlit.runtime.scriptrunner import RerunData, RerunException
    from streamlit.source_util import get_pages
    import streamlit as st

    def standardize_name(name: str) -> str:
        return name.lower().replace("_", " ")

    button = st.button(label=button_text)

    if button:
        page_name = standardize_name(page_name)

        pages = get_pages("streamlit_app.py")  # OR whatever your main page is called

        for page_hash, config in pages.items():
            if standardize_name(config["page_name"]) == page_name:
                raise RerunException(
                    RerunData(
                        page_script_hash=page_hash,
                        page_name=page_name,
                    )
                )

        page_names = [
            standardize_name(config["page_name"]) for config in pages.values()
        ]

        raise ValueError(
            f"Could not find page {page_name}. Must be one of {page_names}"
        )