That means that, clients using your API don't have to check if the value exists or not, they can **assume the field will always be there**, but just that in some cases it will have the default value of `None`.

The way to describe this in OpenAPI, is to mark that field as **required**, because it will always be there.

Because of that, the JSON Schema for a model can be different depending on if it's used for **input or output**:

	// This function is a reference (re-)implementation of
	// decrypted range computation, written solely for the purpose
	// of the unit tests.
	//
	// `s` gives the decrypted part sizes, and the other
	// parameters describe the desired read segment. When
	// `isFromEnd` is true, `skipLen` argument is ignored.
	decryptedRangeRef := func(s []int64, skipLen, readLen int64, isFromEnd bool) (o, l, skip int64, sn uint32, ps int) {
		oSize := lsum(s)

		desc:          prometheus.NewDesc("minio_bucket_stats", "Statistics exposed by MinIO server cluster wide per bucket", nil, nil),
	}
}

// Describe sends the super-set of all possible descriptors of metrics
func (c *minioBucketCollector) Describe(ch chan<- *prometheus.Desc) {
	ch <- c.desc
}

// Collect is called by the Prometheus registry when collecting metrics.

### What is a Program { #what-is-a-program }

The word **program** is commonly used to describe many things:

* The **code** that you write, the **Python files**.
* The **file** that can be **executed** by the operating system, for example: `python`, `python.exe` or `uvicorn`.

`MultipartBody.Builder` can build sophisticated request bodies compatible with HTML file upload forms. Each part of a multipart request body is itself a request body, and can define its own headers. If present, these headers should describe the part body, such as its `Content-Disposition`. The `Content-Length` and `Content-Type` headers are added automatically if they're available.

=== ":material-language-kotlin: Kotlin"
    ```kotlin

   ([#125437](https://github.com/kubernetes/kubernetes/pull/125437), [@ardaguclu](https://github.com/ardaguclu)) [SIG CLI and Testing]
- "`kubectl describe service`" and "`kubectl describe ingress`" will now use endpointslices instead of endpoints.
   ([#124598](https://github.com/kubernetes/kubernetes/pull/124598), [@aroradaman](https://github.com/aroradaman)) [SIG CLI and Network]

- Fixed an issue where kubectl doesn't print image volume when kubectl describe a pod with that volume. ([#126706](https://github.com/kubernetes/kubernetes/pull/126706), [@carlory](https://github.com/carlory))

- Added Traffic Distribution field to `kubectl describe service` output ([#131491](https://github.com/kubernetes/kubernetes/pull/131491), [@tchap](https://github.com/tchap)) [SIG CLI]

- YAML input that might previously have been misinterpreted as JSON is now correctly accepted. ([#130666](https://github.com/kubernetes/kubernetes/pull/130666), [@thockin](https://github.com/thockin))
- [kubectl] Improved the describe output for projected volume sources to clearly indicate whether Secret and ConfigMap entries are optional. ([#129457](https://github.com/kubernetes/kubernetes/pull/129457), [@gshaibi](https://github.com/gshaibi)) [SIG CLI]

//// tab | Pydantic v2

In Pydantic version 2, you would use the attribute `model_config`, that takes a `dict` as described in <a href="https://docs.pydantic.dev/latest/api/config/" class="external-link" target="_blank">Pydantic's docs: Configuration</a>.