* peers. Sets of root certificates are managed by either the HTTP client (like Firefox), or the
 * host platform (like Android). In July 2018 Android had 134 trusted root certificates for its HTTP
 * clients to trust.
 *
 * For example, in order to establish a secure connection to `https://www.squareup.com/`,
 * these three certificates are used.
 *
 * ```

 *
 * <p>The maps produced by {@code MapMaker} are serializable, and the deserialized maps retain all
 * the configuration properties of the original map. During deserialization, if the original map had
 * used weak references, the entries are reconstructed as they were, but it's not unlikely they'll
 * be quickly garbage-collected before they are ever accessed.
 *

Lo que inspiró a **FastAPI**, cómo se compara con las alternativas y lo que aprendió de ellas.

## Introducción

**FastAPI** no existiría si no fuera por el trabajo previo de otros.

Se han creado muchas herramientas antes que han ayudado a inspirar su creación.

  * Deployment was Alpha in 1.1 (though it had apiVersion extensions/v1beta1) and
was disabled by default. Due to some non-backward-compatible API changes, any
Deployment objects you created in 1.1 won’t work with in the 1.2 release.

 * This communicates to your callers all of the semantic guarantees listed above, which is almost
 * always very useful information.
 *
 * <p>On the other hand, a <i>parameter</i> type of {@link ImmutableList} is generally a nuisance to
 * callers. Instead, accept {@link Iterable} and have your method or constructor body pass it to the
 * appropriate {@code copyOf} method itself.
 *

		time.Sleep(time.Second)
	}
	rx := float64(globalSiteNetPerfRX.RXSample)
	delta := globalSiteNetPerfRX.firstToDisconnect.Sub(globalSiteNetPerfRX.lastToConnect)
	// If the first disconnected before the last connected, we likely had a network issue.
	if delta <= 0 {
		rx = 0
		errStr = "detected network disconnections, possibly an unstable network"
	}

	globalSiteNetPerfRX.Reset()
	return madmin.SiteNetPerfNodeResult{

    if (eventSubscribers.hasNext()) {
      dispatcher.dispatch(event, eventSubscribers);
    } else if (!(event instanceof DeadEvent)) {
      // the event had no subscribers and was not itself a DeadEvent
      post(new DeadEvent(this, event));
    }
  }

  @Override
  public String toString() {

... àti pẹ̀lú ìkéde kan ṣoṣo yẹn ìwọ yóò gbà:

* Atilẹyin olootu, pẹ̀lú:
    * Pipari.
    * Àyẹ̀wò irúfẹ́ àmì ìtọ́kasí.
* Ìfọwọ́sí àkójọf'áyẹ̀wò (i.e. data):
    * Aṣiṣe alaifọwọyi/aládàáṣiṣẹ́ àti aṣiṣe ti ó hàn kedere nígbàtí àwọn àkójọf'áyẹ̀wò (i.e. data) kò wulo tabi tí kò fẹsẹ̀ múlẹ̀.
    * Ìfọwọ́sí fún ohun elo JSON tí ó jìn gan-an.

Now it's the time to use it with FastAPI. 🚀

We had this type annotation:

//// tab | Python 3.10+

```Python
q: str | None = None
```

////

//// tab | Python 3.8+

```Python
q: Union[str, None] = None
```

////

hợp, cách các biến môi trường trở nên hữu ích và có thể áp dụng không thực sự rõ ràng ngay từ đầu, nhưng chúng sẽ liên tục xuất hiện trong rất nhiều tình huống khi bạn phát triển ứng dụng, vì vậy việc hiểu biết về chúng là hữu ích.

Chẳng hạn, bạn sẽ cần những thông tin này khi bạn học về [Môi trường ảo](virtual-environments.md)....