Semaphore's value argument

Currently we assume that the semaphore's value must be an integer:
https://github.com/python/typeshed/blob/1af9de664f41b51bd3b71dac349564c5c25df810/stdlib/asyncio/locks.pyi#L88-L93

Generally this is correct, but I had a use case where I wanted to disable the semaphore without restructuring my code, so I used float("inf") as the value to ensure that it never unlocks. This works perfectly fine, because the only operations that value needs to support are:

• Adding 1
• Subtracting 1
• Comparing to 0

The infinity float value does all of these fine. So I therefore wonder if we should make this type be int | Literal[math.inf]? I agree that general floats are not a good idea because they will get below 0 without triggering the wait.

Inizia da stdlib/asyncio/locks.pyi alle righe 88-93 e analizza l’annotazione del valore di Semaphore e le convenzioni di typeshed circostanti. Verifica se int | Literal[math.inf] esprime il comportamento supportato, quindi esegui la validazione pertinente di typeshed; il lavoro è completato quando l’annotazione accetta infinity senza estendere il supporto ai floats generici.