add multipage.py

multipage.py

@@ -0,0 +1,42 @@
+"""
+This file is the framework for generating multiple Streamlit applications 
+through an object oriented framework. 
+"""
+
+# 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 class 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 ([str]): 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(
+            'App Navigation', 
+            self.pages, 
+            format_func=lambda page: page['title']
+        )
+
+        # run the app function 
+        page['function']()