- [CSI Migration updates](#csi-migration-updates)
  - [Urgent Upgrade Notes](#urgent-upgrade-notes)
    - [(No, really, you MUST read this before you upgrade)](#no-really-you-must-read-this-before-you-upgrade)
  - [Known Issues](#known-issues)
    - [Etcd v3.5.[0-2] data corruption](#etcd-v350-2-data-corruption)
  - [Changes by Kind](#changes-by-kind-17)
    - [Deprecation](#deprecation)
    - [API Change](#api-change-6)

/// note

Some response codes (see the next section) indicate that the response does not have a body.

FastAPI knows this, and will produce OpenAPI docs that state there is no response body.

///

## About HTTP status codes { #about-http-status-codes }

/// note

If you already know what HTTP status codes are, skip to the next section.

///

- [v1.12.0](#v1120)
  - [Downloads for v1.12.0](#downloads-for-v1120)
    - [Client Binaries](#client-binaries-10)
    - [Server Binaries](#server-binaries-10)
    - [Node Binaries](#node-binaries-10)
  - [Known Issues](#known-issues)
  - [Major Themes](#major-themes)
    - [SIG API Machinery](#sig-api-machinery)
    - [SIG-autoscaling](#sig-autoscaling)
    - [SIG-Azure](#sig-azure)
    - [SIG-cli](#sig-cli)

    - [Introduced KMS v2](#introduced-kms-v2)
    - [Kube-proxy images are now based on distroless images](#kube-proxy-images-are-now-based-on-distroless-images)
  - [Known Issues](#known-issues)
    - [LocalStorageCapacityIsolationFSQuotaMonitoring ConfigMap rendering failure](#localstoragecapacityisolationfsquotamonitoring-configmap-rendering-failure)
  - [Urgent Upgrade Notes](#urgent-upgrade-notes)

```Python
if "johndoe" == "stanleyjobson" and "love123" == "swordfish":
    ...
```

But right at the moment Python compares the first `j` in `johndoe` to the first `s` in `stanleyjobson`, it will return `False`, because it already knows that those two strings are not the same, thinking that "there's no need to waste more computation comparing the rest of the letters". And your application will say "Incorrect username or password".

- [Kubernetes v1.16.0 Release Notes](#kubernetes-v1160-release-notes)
  - [What’s New (Major Themes)](#what’s-new-major-themes)
    - [Additional Notable Feature Updates](#additional-notable-feature-updates)
  - [Known Issues](#known-issues)
  - [Urgent Upgrade Notes](#urgent-upgrade-notes-1)
    - [(No, really, you MUST read this before you upgrade)](#no-really-you-must-read-this-before-you-upgrade-1)
      - [Cluster Lifecycle](#cluster-lifecycle)

```Python hl_lines="2"
# This is not asynchronous
def get_sequential_burgers(number: int):
    # Do some sequential stuff to create the burgers
    return burgers
```

With `async def`, Python knows that, inside that function, it has to be aware of `await` expressions, and that it can "pause" ⏸ the execution of that function and go do something else 🔀 before coming back.

  /**
   * The elements in this map would pass the UNDER test, but are known not to be public suffixes and
   * are thus excluded from consideration. Since it refers to elements in UNDER of the same type,
   * the type is actually not important here. The map is simply used for consistency reasons.
   */

Check this function, it already has type hints:

{* ../../docs_src/python_types/tutorial003_py39.py hl[1] *}

Because the editor knows the types of the variables, you don't only get completion, you also get error checks:

<img src="/img/python-types/image04.png">

Now you know that you have to fix it, convert `age` to a string with `str(age)`:

{* ../../docs_src/python_types/tutorial004_py39.py hl[2] *}

**FastAPI** knows what to do in each case and how to reuse the same object, so that all the background tasks are merged together and are run in the background afterwards:


{* ../../docs_src/background_tasks/tutorial002_an_py310.py hl[13,15,22,25] *}