## Example

Here's an example *path operation* with parameters using some of the above types.

//// tab | Python 3.10+

```Python hl_lines="1  3  12-16"
{!> ../../docs_src/extra_data_types/tutorial001_an_py310.py!}
```

////

//// tab | Python 3.9+

        "paths": {
            "/items/": {
                "get": {
                    "summary": "Read Items",
                    "operationId": "read_items_items__get",
                    "parameters": [
                        {
                            "required": True,
                            "schema": {"title": "X-Token", "type": "string"},
                            "name": "x-token",

        return "FileAuthentication [fileConfig=" + fileConfig + ", createdBy=" + createdBy + ", createdTime=" + createdTime
                + ", fileConfigId=" + fileConfigId + ", hostname=" + hostname + ", parameters=" + parameters + ", port=" + port
                + ", protocolScheme=" + protocolScheme + ", updatedBy=" + updatedBy + ", updatedTime=" + updatedTime + ", username="
                + username + ", docMeta=" + docMeta + "]";
    }

## Metadata for tags

You can also add additional metadata for the different tags used to group your path operations with the parameter `openapi_tags`.

It takes a list containing one dictionary for each tag.

Each dictionary can contain:

* `name` (**required**): a `str` with the same tag name you use in the `tags` parameter in your *path operations* and `APIRouter`s.

    val charset = parameter("charset") ?: return defaultValue
    return try {
      Charset.forName(charset)
    } catch (_: IllegalArgumentException) {
      defaultValue // This charset is invalid or unsupported. Give up.
    }
  }

  /**
   * Returns the parameter [name] of this media type, or null if this media type does not define
   * such a parameter.
   */

        }
    },
    "info": {"title": "FastAPI", "version": "0.1.0"},
    "openapi": "3.1.0",
    "paths": {
        "/": {
            "get": {
                "operationId": "get_deps__get",
                "parameters": [
                    {
                        "in": "header",
                        "name": "someheader",
                        "required": True,

        "openapi": "3.1.0",
        "paths": {
            "/{repeated_alias}": {
                "get": {
                    "operationId": "get_parameters_with_repeated_aliases__repeated_alias__get",
                    "parameters": [
                        {
                            "in": "path",
                            "name": "repeated_alias",
                            "required": True,

     * Even if empty string, treated as empty plainly. So "IF pmb != null" is false if empty.
     * @param clustername The parameter value of clustername. (NotNull)
     */
    public void setClustername(String clustername) {
        registerVariable("clustername", clustername);
    }

    /**
     * Set the value of clusterstatus, used in parameter comment. <br>

@pytest.fixture(name="client")
def get_client():
    from docs_src.schema_extra_example.tutorial004_an_py310 import app

    client = TestClient(app)
    return client


# Test required and embedded body parameters with no bodies sent
@needs_py310
def test_post_body_example(client: TestClient):
    response = client.put(
        "/items/5",
        json={
            "name": "Foo",

                            },
                        },
                    },
                    "summary": "Read Items",
                    "operationId": "read_items_items__get",
                    "parameters": [
                        {
                            "required": False,
                            "schema": IsDict(
                                {