* **ExchangeFinder** chooses which connection carries each exchange. Where possible it will use the same connection for all exchanges in a single call. It prefers reusing pooled connections over establishing new connections.      

#### Per-Connection Locks

```Python
with open("file.txt") as file:
    file.read()
```

In neueren Versionen von Python gibt es auch einen **asynchronen Kontextmanager**. Sie würden ihn mit `async with` verwenden:

```Python
async with lifespan(app):
    await do_stuff()
```

participant dep as Dep with yield
participant operation as Path Operation
participant tasks as Background tasks

    Note over client,tasks: Can raise exception for dependency, handled after response is sent
    Note over client,operation: Can raise HTTPException and can change the response
    client ->> dep: Start request
    Note over dep: Run code up to yield
    opt raise
        dep -->> handler: Raise HTTPException

{* ../../docs_src/events/tutorial003.py hl[1,13] *}

A **context manager** in Python is something that you can use in a `with` statement, for example, `open()` can be used as a context manager:

```Python
with open("file.txt") as file:
    file.read()
```

In recent versions of Python, there's also an **async context manager**. You would use it with `async with`:

```Python

# Swagger-Oberfläche konfigurieren

Sie können einige zusätzliche <a href="https://swagger.io/docs/open-source-tools/swagger-ui/usage/configuration/" class="external-link" target="_blank">Parameter der Swagger-Oberfläche</a> konfigurieren.

Um diese zu konfigurieren, übergeben Sie das Argument `swagger_ui_parameters` beim Erstellen des `FastAPI()`-App-Objekts oder an die Funktion `get_swagger_ui_html()`.

import jcifs.internal.smb1.ServerMessageBlock;
import jcifs.internal.util.SMBUtil;
import jcifs.util.Hexdump;

/**
 * SMB1 Open AndX request message.
 *
 * This command is used to open or create a file for access over
 * the network with enhanced capabilities compared to the basic Open command.
 */
public class SmbComOpenAndX extends AndXServerMessageBlock {

    // flags (not the same as flags constructor argument)

///

## `HTTPSRedirectMiddleware`

Erzwingt, dass alle eingehenden Requests entweder `https` oder `wss` sein müssen.

Alle eingehenden Requests an `http` oder `ws` werden stattdessen an das sichere Schema umgeleitet.

{* ../../docs_src/advanced_middleware/tutorial001.py hl[2,6] *}

## `TrustedHostMiddleware`

Denken Sie einfach daran, wenn Sie „Server“ im Allgemeinen lesen, dass es sich auf eines dieser beiden Dinge beziehen kann.

   * MultimapBuilder.hashKeys(expectedKeys).arrayListValues(expectedValuesPerKey).build()}, which
   * provides more control over the underlying data structure.
   *
   * @param expectedKeys the expected number of distinct keys
   * @param expectedValuesPerKey the expected average number of values per key
   * @throws IllegalArgumentException if {@code expectedKeys} or {@code expectedValuesPerKey} is
   *     negative
   */

        assertEquals(UserAgentType.CHROME, userAgentHelper.getUserAgentType());
    }

    public void test_getUserAgentType_operaClassic() {
        getMockRequest().addHeader("user-agent", "Opera/9.80 (Windows NT 6.0) Presto/2.12.388 Version/12.14");
        assertEquals(UserAgentType.OPERA, userAgentHelper.getUserAgentType());
    }