```console
$ pip install python-multipart
```

///

## Importer `File` et `Form` { #import-file-and-form }

{* ../../docs_src/request_forms_and_files/tutorial001_an_py310.py hl[3] *}

## Définir des paramètres `File` et `Form` { #define-file-and-form-parameters }

Créez des paramètres de fichier et de formulaire de la même manière que pour `Body` ou `Query` :

"""
Regression test, Error 422 if Form is declared before File
See https://github.com/tiangolo/fastapi/discussions/9116
"""

from pathlib import Path
from typing import Annotated

import pytest
from fastapi import FastAPI, File, Form
from fastapi.testclient import TestClient

app = FastAPI()


@app.post("/file_before_form")
def file_before_form(
    file: bytes = File(),
    city: str = Form(),
):

  ).substr(0, 2);
  moment.locale(lang);
  $("input.form-control.date")
    .daterangepicker({
      autoUpdateInput: false,
      timePicker: false,
      singleDatePicker: true,
      locale: {
        format: "YYYY-MM-DD"
      }
    })
    .on("apply.daterangepicker", function(ev, picker) {
      $(this).val(picker.startDate.format("YYYY-MM-DD"));
    });
  $("input.form-control.daterange")
    .daterangepicker({

import json
from typing import Annotated

from fastapi import Cookie, FastAPI, Form, Header, Query
from fastapi.testclient import TestClient
from pydantic import Json

app = FastAPI()


@app.post("/form-json-list")
def form_json_list(items: Annotated[Json[list[str]], Form()]) -> list[str]:
    return items


@app.get("/query-json-list")
def query_json_list(items: Annotated[Json[list[str]], Query()]) -> list[str]:
    return items

///

## 「Form Data」とは { #what-is-form-data }

HTML フォーム（`<form></form>`）がサーバーにデータを送る方法は、そのデータに対して通常「特別な」エンコーディングを用い、JSON とは異なります。

**FastAPI** は JSON ではなく、適切な場所からそのデータを読み取るようにします。

/// note | 技術詳細

ファイルを含まない場合、フォームからのデータは通常「メディアタイプ」`application/x-www-form-urlencoded` でエンコードされます。

    /**
     * Add the created action message for the key 'errors.invalid_kuromoji_segmentation' with parameters.
     * <pre>
     * message: The number of segmentation for {0} and {1} is different.
     * </pre>
     * @param property The property name for the message. (NotNull)
     * @param arg0 The parameter arg0 for message. (NotNull)
     * @param arg1 The parameter arg1 for message. (NotNull)
     * @return this. (NotNull)

argument is specified: cloud-controller-manager, kube-apiserver, kube-controller-manager, kube-proxy, kubeadm {alpha|config|token|version}, kubemark. Flags should be prefixed with a single dash "-" (0x45) for short form or double dash "--" for long form. Before this change, malformed flags (for example, starting with a non-ascii dash character such as 0x8211: "–") would have been silently treated as positional arguments and ignored. ([#91349](https://github.com/kubernetes/kubernetes/pull/91349),...

  public void testLog2NegativeAlwaysThrows() {
    for (int x : NEGATIVE_INTEGER_CANDIDATES) {
      for (RoundingMode mode : ALL_ROUNDING_MODES) {
        assertThrows(IllegalArgumentException.class, () -> IntMath.log2(x, mode));
      }
    }
  }

  // Relies on the correctness of BigIntegerMath.log2 for all modes except UNNECESSARY.
  public void testLog2MatchesBigInteger() {
    for (int x : POSITIVE_INTEGER_CANDIDATES) {

  public void testZeroDivIsAlwaysZero() {
    for (long q : NONZERO_LONG_CANDIDATES) {
      for (RoundingMode mode : ALL_ROUNDING_MODES) {
        assertEquals(0L, LongMath.divide(0L, q, mode));
      }
    }
  }

  @GwtIncompatible // TODO
  public void testDivByZeroAlwaysFails() {
    for (long p : ALL_LONG_CANDIDATES) {
      for (RoundingMode mode : ALL_ROUNDING_MODES) {

 * [Coil](https://github.com/coil-kt/coil): An image loading library for Android backed by Kotlin Coroutines.
 * [Communicator](https://github.com/Taig/Communicator): An OkHttp wrapper for Scala built with Android in mind.
 * [Cronet Transport for OkHttp](https://github.com/google/cronet-transport-for-okhttp): A HTTP3 ready transport layer for OkHttp on Android, based on Chromium network stack.