response = client.get("/openapi.json")
    assert response.status_code == 200, response.text
    assert response.json() == {
        "openapi": "3.1.0",
        "info": {"title": "FastAPI", "version": "0.1.0"},
        "paths": {
            "/items/{item_id}": {
                "get": {
                    "responses": {
                        "200": {
                            "description": "Successful Response",

```

</div>

### Шаг 3: определите *операцию пути (path operation)*

#### Путь (path)

"Путь" это часть URL, после первого символа `/`, следующего за именем домена.

Для URL:

```
https://example.com/items/foo
```

...путь выглядит так:

```
/items/foo
```

!!! info "Дополнительная иформация"
    Термин "path" также часто называется "endpoint" или "route".

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
```

</div>

If you use Hypercorn, it also has the option `--root-path`.

!!! note "Technical Details"
    The ASGI specification defines a `root_path` for this use case.

    And the `--root-path` command line option provides that `root_path`.

### Checking the current `root_path`

### Step 3: create a *path operation*

#### Path

"Path" here refers to the last part of the URL starting from the first `/`.

So, in a URL like:

```
https://example.com/items/foo
```

...the path would be:

```
/items/foo
```

!!! info
    A "path" is also commonly called an "endpoint" or a "route".

    assert response.status_code == 200, response.text
    assert response.json() == {
        "openapi": "3.1.0",
        "info": {"title": "FastAPI", "version": "0.1.0"},
        "paths": {
            "/dict": {
                "get": {
                    "summary": "Read Dict",
                    "operationId": "read_dict_dict_get",
                    "responses": {

```

Hai appena creato un'API che:

* Riceve richieste HTTP sui _paths_ `/` and `/items/{item_id}`.
* Entrambi i _paths_ accettano`GET` operations (conosciuti anche come <abbr title="metodi HTTP">HTTP _methods_</abbr>).
* Il _path_ `/items/{item_id}` ha un _path parameter_ `item_id` che deve essere un `int`.
* Il _path_ `/items/{item_id}` ha una `str` _query parameter_ `q`.

### Documentazione interattiva dell'API

    assert response.status_code == 200, response.text
    assert response.json() == {
        "openapi": "3.1.0",
        "info": {"title": "FastAPI", "version": "0.1.0"},
        "paths": {
            "/token": {
                "post": {
                    "responses": {
                        "200": {
                            "description": "Successful Response",

    assert response.status_code == 200, response.text
    assert response.json() == {
        "openapi": "3.1.0",
        "info": {"title": "FastAPI", "version": "0.1.0"},
        "paths": {
            "/items/": {
                "post": {
                    "responses": {
                        "200": {
                            "description": "Successful Response",

    assert response.status_code == 200, response.text
    assert response.json() == {
        "openapi": "3.1.0",
        "info": {"title": "FastAPI", "version": "0.1.0"},
        "paths": {
            "/items/": {
                "post": {
                    "responses": {
                        "200": {
                            "description": "Successful Response",

Es wird ein JSON angezeigt, welches ungefähr so aussieht:

```JSON
{
    "openapi": "3.1.0",
    "info": {
        "title": "FastAPI",
        "version": "0.1.0"
    },
    "paths": {
        "/items/": {
            "get": {
                "responses": {
                    "200": {
                        "description": "Successful Response",
                        "content": {