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You call a library, but a framework calls you.

A framework IS the entry point to your application. If you use libraries you write your own entry point.

And there's exceptions to each case.

I can see the distinction that people are trying to make here but it's far from a binary one.

Yes, if a library is implemented in a language which supports closures, the difference between it and a framework starts to vanish.

Can you name some of these exceptions?

In Flask, you call the framework, then it calls you back etc. It is a minimal framework that you can use as a library along other "plugins" (which are libraries in fact) you like.

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