```Python hl_lines="2"
@app.get('/')
def results():
    results = some_library()
    return results
```

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Si votre application n'a pas à communiquer avec une bibliothèque externe et pas à attendre de réponse, utilisez `async def`.

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Si vous ne savez pas, utilisez seulement `def` comme vous le feriez habituellement.

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So, during that time, the computer can go and do some other work, while "slow-file" 📝 finishes.

Then the computer / program 🤖 will come back every time it has a chance because it's waiting again, or whenever it 🤖 finished all the work it had at that point. And it 🤖 will see if any of the tasks it was waiting for have already finished, doing whatever it had to do.

Então a certo ponto, é finalmente sua vez. Você vai no balcão, pega seus hambúrgueres e volta para a mesa.

Você e seu _crush_ :heart_eyes: comem os hambúrgueres e aproveitam o tempo.

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Imagine que você seja o computador  / programa nessa história.