Multi-page Apps
Our Streamlit apps thus far have all been single pages, where all or nearly all the information in the app has been visible to us with a simple scroll. However, Streamlit also has multi-page functionality. Multi-page apps are a powerful tool for creating apps that are not limited to one page of content, and can extend that user experience that comes with Streamlit.
For our first application of multi-page apps, we’re going to focus on separating the map section of the trees app from the rest of the graphs in two separate apps. The way Streamlit creates multi-page apps is it looks in the same directory as our Streamlit app for a folder called pages, and then runs each Python file inside the pages folder as its own Streamlit app. To do this, create a new folder inside pretty_trees called pages, and then a files inside pages called map.py and app2.py. In your terminal from the base folder in the repository, you can run the following.
mkdir pages
touch pages/map.py