The rightmost column of the table contains a latency histogram for each region group.
Note that this histogram only counts regions that began and ended within the traced
period.
However, the "Count" column includes all regions, including those that only started
or ended during the traced period.
Regions that were active through the trace period were not recorded, and so are not
accounted for at all.

In Python können Sie Kontextmanager erstellen, indem Sie <a href="https://docs.python.org/3/reference/datamodel.html#context-managers" class="external-link" target="_blank">eine Klasse mit zwei Methoden erzeugen: `__enter__()` und `__exit__()`</a>.

Sie können solche auch innerhalb von **FastAPI**-Abhängigkeiten mit `yield` verwenden, indem Sie `with`- oder `async with`-Anweisungen innerhalb der Abhängigkeits-Funktion verwenden:

## Lokal testen mit Traefik

Sie können das Experiment mit einem abgetrennten Pfadpräfix ganz einfach lokal ausführen, indem Sie <a href="https://docs.traefik.io/" class="external-link" target="_blank">Traefik</a> verwenden.

	ENFILE             = Errno(127)
	ENOATTR            = Errno(265)
	ENODEV             = Errno(128)
	ENOENT             = Errno(129)
	ENOEXEC            = Errno(130)
	ENOLCK             = Errno(131)
	ENOMEM             = Errno(132)
	ENOSPC             = Errno(133)
	ENOSYS             = Errno(134)
	ENOTDIR            = Errno(135)
	ENOTEMPTY          = Errno(136)
	ENOTTY             = Errno(137)

import java.util.NoSuchElementException;
import java.util.PriorityQueue;
import java.util.Queue;
import javax.annotation.CheckForNull;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * A double-ended priority queue, which provides constant-time access to both its least element and
 * its greatest element, as determined by the queue's specified comparator. If no comparator is

Dieses bestimmte reguläre Suchmuster prüft, ob der erhaltene Parameter-Wert:

* `^`: mit den nachfolgenden Zeichen startet, keine Zeichen davor hat.
* `fixedquery`: den exakten Text `fixedquery` hat.
* `$`: danach endet, keine weiteren Zeichen hat als `fixedquery`.

         * gets occasionally extended by newer Maven versions). This imposes the risk for existing plugins to
         * unintentionally use such a magic expression for an ordinary property. So here we check whether we
         * ended up with a magic value that is not compatible with the type of the configured mojo parameter (a string
         * could still be converted by the configurator so we leave those alone). If so, back off to evaluating the

import java.util.NoSuchElementException;
import java.util.PriorityQueue;
import java.util.Queue;
import javax.annotation.CheckForNull;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * A double-ended priority queue, which provides constant-time access to both its least element and
 * its greatest element, as determined by the queue's specified comparator. If no comparator is

    Das ist keine Limitation von **FastAPI**, sondern Teil des HTTP-Protokolls.

## Optionaler Datei-Upload

Sie können eine Datei optional machen, indem Sie Standard-Typannotationen verwenden und den Defaultwert auf `None` setzen:

=== "Python 3.10+"

    ```Python hl_lines="9  17"
    {!> ../../../docs_src/request_files/tutorial001_02_an_py310.py!}
    ```

      try {
        workOnQueue();
      } catch (Error e) {
        synchronized (queue) {
          workerRunningState = IDLE;
        }
        throw e;
        // The execution of a task has ended abnormally.
        // We could have tasks left in the queue, so should perhaps try to restart a worker,
        // but then the Error will get delayed if we are using a direct (same thread) executor.
      }
    }