"AssignmentExpression", // Not using it is more a matter of taste.
        "EffectivelyPrivate", // It is still useful to distinguish between public interface and implementation details of inner classes even though it isn't enforced.
        "InjectOnConstructorOfAbstractClass", // We use abstract injection as a pattern
        "InlineMeSuggester", // Only suppression seems to actually "fix" this, so make it global

```JSON
{
    "name": "Foo",
    "price": 45.2
}
```

## Declare it as a parameter { #declare-it-as-a-parameter }

To add it to your *path operation*, declare it the same way you declared path and query parameters:

{* ../../docs_src/body/tutorial001_py310.py hl[16] *}

...and declare its type as the model you created, `Item`.

You can return it directly.

It accepts the following parameters:

* `content` - A `str` or `bytes`.
* `status_code` - An `int` HTTP status code.
* `headers` - A `dict` of strings.
* `media_type` - A `str` giving the media type. E.g. `"text/html"`.

        val rcSuffix = buildRcNumber.map { "-rc-$it" }
        val milestoneSuffix = buildMilestoneNumber.map { "-milestone-$it" }
        val buildVersionQualifierSuffix = buildVersionQualifier.zip(buildTimestamp) { buildVersion, timestamp -> "-$buildVersion-$timestamp" }
        val buildTimestampSuffix = buildTimestamp.map { "-$it" }

////

## Upgrade `pip` { #upgrade-pip }

/// tip

If you use <a href="https://github.com/astral-sh/uv" class="external-link" target="_blank">`uv`</a> you would use it to install things instead of `pip`, so you don't need to upgrade `pip`. 😎

///

If you are using `pip` to install packages (it comes by default with Python), you should **upgrade** it to the latest version.

To create the callback *path operation* use the same `APIRouter` you created above.

It should look just like a normal FastAPI *path operation*:

* It should probably have a declaration of the body it should receive, e.g. `body: InvoiceEvent`.
* And it could also have a declaration of the response it should return, e.g. `response_model=InvoiceEventReceived`.

If it finds it, then it will **use it**. Otherwise it keeps looking in the **other directories**.

### Installing Python and Updating the `PATH` { #installing-python-and-updating-the-path }

When you install Python, you might be asked if you want to update the `PATH` environment variable.

//// tab | Linux, macOS

Let's say you install Python and it ends up in a directory `/opt/custompython/bin`.

    """
    OpenID Connect authentication class. An instance of it would be used as a
    dependency.

    **Warning**: this is only a stub to connect the components with OpenAPI in FastAPI,
    but it doesn't implement the full OpenIdConnect scheme, for example, it doesn't use
    the OpenIDConnect URL. You would need to to subclass it and implement it in your
    code.
    """

    def __init__(
        self,
        *,

            val (linesBeforeContributors, _, linesAfterContributors) = parseReleaseNotes()
            releaseNotes.asFile.get().writeText(
                "${linesBeforeContributors.joinToString("\n")}\n${sortedContributors.joinToString(",\n") { "[${it.value.name ?: it.key}](https://github.com/${it.key})" }}\n\n${linesAfterContributors.joinToString("\n")}\n"

{* ../../docs_src/path_params_numeric_validations/tutorial001_an_py310.py hl[10] *}

/// note

A path parameter is always required as it has to be part of the path. Even if you declared it with `None` or set a default value, it would not affect anything, it would still be always required.

///

## Order the parameters as you need { #order-the-parameters-as-you-need }

/// tip