[Python] What are the advantages of using Depends in FastAPI over just calling a dependent...

FastAPI provides a way to manage dependencies, like DB connection, via its own dependency resolution mechanism.

It resembles a pytest fixture system. In a nutshell, you declare what you need in a function signature, and FastAPI will call the functions(or classes) you mentioned and inject the correct results when the handler is called.

Yes, it does caching(during the single handler run), but can't we achieve the same thing using just @lru_cache decorator and simply calling those dependencies on each run? Am I missing something?

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