/// tip

Als je Python 3.9 of hoger gebruikt, hoef je `List` niet te importeren uit `typing`, je kunt in plaats daarvan hetzelfde reguliere `list` type gebruiken.

///

Door dat te doen, kan je editor ondersteuning bieden, zelfs tijdens het verwerken van items uit de list:

<img src="/img/python-types/image05.png">

Zonder types is dat bijna onmogelijk om te bereiken.

Je kunt ook een omgevingsvariabele maken die alleen voor een **specifieke programma-aanroep** beschikbaar is, die alleen voor dat programma beschikbaar is en alleen voor de duur van dat programma.

Om dat te doen, maak je het vlak voor het programma zelf aan, op dezelfde regel:

<div class="termy">

```console
// Maak een omgevingsvariabele MY_NAME in de regel voor deze programma-aanroep
$ MY_NAME="Wade Wilson" python main.py

    * ...en anderen.

Alle validatie wordt uitgevoerd door het beproefde en robuuste **Pydantic**.

### Beveiliging en authenticatie

Beveiliging en authenticatie is geïntegreerd. Zonder compromissen te doen naar databases of datamodellen.

Alle beveiligingsschema's gedefinieerd in OpenAPI, inclusief:

* HTTP Basic.

    do {
      System.runFinalization();
      if (predicate.isDone()) {
        return;
      }
      CountDownLatch done = new CountDownLatch(1);
      createUnreachableLatchFinalizer(done);
      await(done);
      if (predicate.isDone()) {
        return;
      }
    } while (System.nanoTime() - deadline < 0);
    throw formatRuntimeException(

    do {
      System.runFinalization();
      if (predicate.isDone()) {
        return;
      }
      CountDownLatch done = new CountDownLatch(1);
      createUnreachableLatchFinalizer(done);
      await(done);
      if (predicate.isDone()) {
        return;
      }
    } while (System.nanoTime() - deadline < 0);
    throw formatRuntimeException(

**FastAPI** hoàn toàn được dựa trên những gợi ý kiểu dữ liệu, chúng mang đến nhiều ưu điểm và lợi ích.

Nhưng thậm chí nếu bạn không bao giờ sử dụng **FastAPI**, bạn sẽ được lợi từ việc học một ít về chúng.

/// note

Nếu bạn là một chuyên gia về Python, và bạn đã biết mọi thứ về gợi ý kiểu dữ liệu, bỏ qua và đi tới chương tiếp theo.

///

## Động lực

Hãy bắt đầu với một ví dụ đơn giản:

```Python

@ElementTypesAreNonnullByDefault
public final class MoreExecutors {
  private MoreExecutors() {}

  /**
   * Converts the given ThreadPoolExecutor into an ExecutorService that exits when the application
   * is complete. It does so by using daemon threads and adding a shutdown hook to wait for their
   * completion.
   *
   * <p>This is mainly for fixed thread pools. See {@link Executors#newFixedThreadPool(int)}.
   *

          exit 1
        fi
      else
        echo "POM file ${arg} specified with the -f/--file command line argument does not exist" >&2
        exit 1
      fi
      break
    fi
    if [ "$arg" = "-f" -o "$arg" = "--file" ]; then
      found_file_switch=1
    fi
  done
  echo "$basedir"
)
}

		echo "$site server logs ========="
		cat "/tmp/${site}_1.log"
		echo "==========================="
		cat "/tmp/${site}_2.log"
	done

	exit 1
}

cleanup() {
	echo -n "Cleaning up instances of MinIO ..."
	pkill -9 minio || sudo pkill -9 minio
	rm -rf /tmp/sitea
	rm -rf /tmp/siteb
	echo "done"
}

cleanup

export MINIO_CI_CD=1
export MINIO_BROWSER=off

make install-race

# Start MinIO instances

  held off after the release. Hiding/Showing documentation does not require TOC approval.
* Cases for other API changes require TOC approval
    * Simple `meshConfig` changes have been approved in the past. Functionality should not be enabled by default.
* For large API changes, 2 members of the TOC must approve the PR before release manager approval in the release branch
  of the istio/api repository. This does not have to wait for the weekly TOC meeting.