multipage.py

"""
Class for generating multiple Streamlit applications in the same web page.
"""

# Import necessary libraries 
import streamlit as st

# Define the multipage class to manage the multiple apps in our program 
class MultiPage:
  """Framework for combining multiple streamlit applications."""

  def __init__(self) -> None:
    """Constructor Method.

    Used to to generate a list which will store all our applications as an
    instance variable.
    """
    self.pages = []

  def add_page(self, title, func) -> None:
    """Class Method to Add pages to the project

    Args:
      title: The title of page which we are adding to the list of apps 
      
      func: Python function to render this page in Streamlit
    """

    self.pages.append(
      {
        "title": title,
        "function": func
      }
    )

  def run(self):
    # Drodown to select the page to run
    page = st.sidebar.selectbox(
      'Secciones',
      self.pages,
      format_func=lambda page: page['title']
    )

    # run the app function
    page['function']()