particular architecture.
</p>

<h3 id="String_types">String types</h3>

<p>
A <i>string type</i> represents the set of string values.
A string value is a (possibly empty) sequence of bytes.
The number of bytes is called the length of the string and is never negative.
Strings are immutable: once created,
it is impossible to change the contents of a string.
The predeclared string type is <code>string</code>;

### Refactors

* ♻️ Update mypy. PR [#11049](https://github.com/tiangolo/fastapi/pull/11049) by [@k0t3n](https://github.com/k0t3n).
* ♻️ Simplify string format with f-strings in `fastapi/applications.py`. PR [#11335](https://github.com/tiangolo/fastapi/pull/11335) by [@igeni](https://github.com/igeni).

### Upgrades