API REST Package for Calling/Flask

[muzikman]

I understand that. So, basically - if I were to use Flask, I would use the Requests package. But I also had some other questions regarding Flask, which included questions about breaking up the app.py file into smaller more specific files and if URL rewriting is possible with Flask?

I'm confused what you're asking. You say you want to make a call to a REST API, but you seem to think using, say, Requests is unsuitable. Why is that? It's an HTTP client, which is what you need to call what people talk about when they say REST API.