Yani, bu örneği çalıştırıp [http://127.0.0.1:8000/items/foo](http://127.0.0.1:8000/items/foo) adresine giderseniz, şöyle bir response görürsünüz:

```JSON
{"item_id":"foo"}
```

## Tip İçeren Yol Parametreleri { #path-parameters-with-types }

Standart Python tip belirteçlerini kullanarak path parametresinin tipini fonksiyonun içinde tanımlayabilirsiniz:

{* ../../docs_src/path_params/tutorial002_py310.py hl[7] *}

* `Header()`
* `Cookie()`
* `Body()`
* `Form()`
* `File()`

OpenAPI içindeki **JSON Schema**’larına eklenecek ek bilgilerle birlikte bir `examples` grubu da tanımlayabilirsiniz.

### `examples` ile `Body` { #body-with-examples }

Burada `Body()` içinde beklenen veri için tek bir örnek içeren `examples` geçiriyoruz:

{* ../../docs_src/schema_extra_example/tutorial003_an_py310.py hl[22:29] *}

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package cmd

import (
	"strings"
	"sync"
	"sync/atomic"
	"time"
	"unsafe"

	"github.com/minio/madmin-go/v3"

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package cmd

import (
	"encoding/binary"
	"encoding/hex"
	"encoding/json"
	"fmt"
	"time"

	"github.com/cespare/xxhash/v2"

/*
 * Copyright (C) 2007 The Guava Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,

 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *

*path operation 関数* のパラメータの型を `bytes` として宣言すると、**FastAPI** がファイルを読み取り、内容を `bytes` として受け取ります。

これは内容全体がメモリに保持されることを意味します。小さなファイルには有効です。

しかし、多くの場合は `UploadFile` を使う方が有利です。

## `UploadFile` によるファイルパラメータ { #file-parameters-with-uploadfile }

型を `UploadFile` にしてファイルパラメータを定義します:

{* ../../docs_src/request_files/tutorial001_an_py310.py hl[14] *}

`UploadFile` を使うことには `bytes` に対する次の利点があります:

- パラメータのデフォルト値に `File()` を使う必要がありません。

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package cmd

import (
	"context"
	"fmt"
	"math"
	"net/http"
	"sync"
	"time"

	"github.com/minio/madmin-go/v3"

/*
 * Copyright 2012-2025 CodeLibs Project and the Others.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,

/*
 * Copyright 2012-2025 CodeLibs Project and the Others.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,