In diesen Fällen können Sie, anstatt einen Parameter der *Pfadoperation-Funktion* mit `Depends` zu deklarieren, eine `list`e von `dependencies` zum *Pfadoperation-Dekorator* hinzufügen.

## `dependencies` zum *Pfadoperation-Dekorator* hinzufügen

Der *Pfadoperation-Dekorator* erhält ein optionales Argument `dependencies`.

Es sollte eine `list`e von `Depends()` sein:

//// tab | Python 3.9+

```Python hl_lines="19"

  private fun readJournalLine(line: String) {
    val firstSpace = line.indexOf(' ')
    if (firstSpace == -1) throw IOException("unexpected journal line: $line")

    val keyBegin = firstSpace + 1
    val secondSpace = line.indexOf(' ', keyBegin)
    val key: String
    if (secondSpace == -1) {
      key = line.substring(keyBegin)
      if (firstSpace == REMOVE.length && line.startsWith(REMOVE)) {

 * <p>{@link #processLine} will be called for each line that is read, and should return {@code
 * false} when you want to stop processing.
 *
 * @author Miles Barr
 * @since 1.0
 */
@J2ktIncompatible
@GwtIncompatible
@ElementTypesAreNonnullByDefault
public interface LineProcessor<T extends @Nullable Object> {

  /**
   * This method will be called once for each line.
   *
   * @param line the line read from the input, without delimiter

Wenn es eine Typannotation gewesen wäre, hätten wir auch den vertikalen Trennstrich verwenden können, wie in:

```Python
some_variable: PlaneItem | CarItem
```

        psOutput.forEach(line -> {
            Matcher commandLineArgsMatcher = commandLineArgsPattern.matcher(line);
            Matcher pidMatcher = pidPattern.matcher(line);
            if (commandLineArgsMatcher.find() && pidMatcher.find()) {
                String pid = pidMatcher.group(1);
                if (!MY_PID.equals(pid)) {
                    action.accept(pid, line);
                }
            }

     *
     * Next is the response status line, followed by the number of HTTP response header lines,
     * followed by those lines.
     *
     * HTTPS responses also contain SSL session information. This begins with a blank line, and then
     * a line containing the cipher suite. Next is the length of the peer certificate chain. These
     * certificates are base64-encoded and appear each on their own line. The next line contains the

            final String[] lines = value.split("[\r\n]");
            for (final String line : lines) {
                if (StringUtil.isNotBlank(line)) {
                    final int pos = line.indexOf('=');
                    if (pos == 0) {
                        paramMap.put("unknown." + (unknownKey + 1), line.substring(pos + 1).trim());
                        unknownKey++;
                    } else if (pos > 0) {

<div class="termy">

```console
$ which pip

some/directory/fastapi/env/bin/pip
```

</div>

////

//// tab | Windows PowerShell

<div class="termy">

```console
$ Get-Command pip

some/directory/fastapi/env/bin/pip
```

</div>

////

Wenn die `pip` Binärdatei unter `env/bin/pip` angezeigt wird, hat es funktioniert. 🎉

          .build(),
      )
    val response = call.execute()
    try {
      println(response.code)
      println("PROTOCOL ${response.protocol}")
      var line: String?
      while (response.body.source().readUtf8Line().also { line = it } != null) {
        println(line)
      }
    } finally {
      response.body.close()
    }
    client.connectionPool.evictAll()
  }

Zum Beispiel, wenn Sie es in einer Datenbank speichern möchten.

Dafür bietet **FastAPI** eine Funktion `jsonable_encoder()`.

## `jsonable_encoder` verwenden

Stellen wir uns vor, Sie haben eine Datenbank `fake_db`, die nur JSON-kompatible Daten entgegennimmt.