I've seen this asked on other forms so I decided to write a tutorial about it. Here is a simple implementation of the PayPal subscription functionality in a Dash App. Dash by Plotly is based on Flask. Maybe it can be of some use to people on this forum? I use the Python paypal checkout SDK, but write two classes to use the subscription api. Then I implement a subscribe button that redirects the user through paypal to complete the transaction. Once logged back in, the user sees the subscriber view.
How to Build a Subscription Business in an Afternoon with PayPal and Dash
