Create middleware for specific route - Python

Create middleware for specific route - Python
If you are creating an API in Python, and came across a problem where you have to create a middleware but for only specific route. For example, you are creating a user authentication system and want to create a middleware that checks if the user is logged-in. But you want to use that middleware for only few routes, not for all routes. Then this tutorial is for you.
This can be done by creating subapps in Python. To create a subapp in Python, first we need to create a file where we will save the global variable of our subapp.
Source code:
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