Bevorzugen Sie die `Annotated`-Version, falls möglich.

///

```Python hl_lines="1"
{!> ../../docs_src/request_forms/tutorial001.py!}
```

////

## `Form`-Parameter definieren

Erstellen Sie Formular-Parameter, so wie Sie es auch mit `Body` und `Query` machen würden:

//// tab | Python 3.9+

```Python hl_lines="9"
{!> ../../docs_src/request_forms/tutorial001_an_py39.py!}
```

////

   */
  static double calculateNewMeanNonFinite(double previousMean, double value) {
    /*
     * Desired behaviour is to match the results of applying the naive mean formula. In particular,
     * the update formula can subtract infinities in cases where the naive formula would add them.
     *
     * Consequently:
     * 1. If the previous mean is finite and the new value is non-finite then the new mean is that

     * numHashFunctions/bitSize)^n)`. Solving that for n, and approximating `ln x` as `x - 1` when x
     * is close to 1 (why?), gives the following formula.
     */
    double fractionOfBitsSet = (double) bitCount / bitSize;
    return DoubleMath.roundToLong(
        -Math.log1p(-fractionOfBitsSet) * bitSize / numHashFunctions, RoundingMode.HALF_UP);
  }

Daten aus Formularen werden, wenn es keine Dateien sind, normalerweise mit dem <abbr title='Media type – Medientyp, Typ des Mediums'>„media type“</abbr> `application/x-www-form-urlencoded` kodiert.

Sollte das Formular aber Dateien enthalten, dann werden diese mit `multipart/form-data` kodiert. Wenn Sie `File` verwenden, wird **FastAPI** wissen, dass es die Dateien vom korrekten Teil des Bodys holen muss.

<img src="/img/tutorial/security/image02.png">

/// note | "Hinweis"

Es spielt keine Rolle, was Sie in das Formular eingeben, es wird noch nicht funktionieren. Wir kommen dahin.

///

Dies ist natürlich nicht das Frontend für die Endbenutzer, aber es ist ein großartiges automatisches Tool, um Ihre gesamte API interaktiv zu dokumentieren.

        if (!(element instanceof Long) || parent.array[i++] != (Long) element) {
          return false;
        }
      }
      return true;
    }

    // Because we happen to use the same formula. If that changes, just don't override this.
    @Override
    public int hashCode() {
      return parent.hashCode();
    }

    @Override
    public String toString() {
      return parent.toString();

        if (!(element instanceof Integer) || parent.array[i++] != (Integer) element) {
          return false;
        }
      }
      return true;
    }

    // Because we happen to use the same formula. If that changes, just don't override this.
    @Override
    public int hashCode() {
      return parent.hashCode();
    }

    @Override
    public String toString() {
      return parent.toString();

        if (!(element instanceof Integer) || parent.array[i++] != (Integer) element) {
          return false;
        }
      }
      return true;
    }

    // Because we happen to use the same formula. If that changes, just don't override this.
    @Override
    public int hashCode() {
      return parent.hashCode();
    }

    @Override
    public String toString() {
      return parent.toString();

        if (!(element instanceof Double) || !areEqual(parent.array[i++], (Double) element)) {
          return false;
        }
      }
      return true;
    }

    // Because we happen to use the same formula. If that changes, just don't override this.
    @Override
    public int hashCode() {
      return parent.hashCode();
    }

    @Override
    public String toString() {
      return parent.toString();

    @Override
    public int hashCode() {
      // Warning: this is broken if size() == 0, so it is critical that we
      // substitute an empty ImmutableSet to the user in place of this

      // It's a weird formula, but tests prove it works.
      int adjust = size() - 1;
      for (int i = 0; i < axes.size(); i++) {
        adjust *= 31;
        adjust = ~~adjust;