{!../../../docs_src/python_types/tutorial009.py!}
```

`str` yerine `Optional[str]` kullanmak editorün bu değerin her zaman `str` tipinde değil bazen `None` tipinde de olabileceğini belirtir ve hataları tespit etmemizde yardımcı olur.

#### Generic tipler

Köşeli parantez içinde tip parametreleri alan bu türler, örneğin:

* `List`
* `Tuple`
* `Set`
* `Dict`
* `Optional`
* ...and others.

Burada "yol" bağlantıda bulunan ilk `/` ile başlayan ve sonrasında gelen kısmı ifade eder.

Yani, şu şekilde bir bağlantıda:

```
https://example.com/items/foo
```

... yol şöyle olur:

```
/items/foo
```

!!! info "Bilgi"
    "Yol" genellikle "<abbr title="Endpoint: Bitim Noktası">endpoint</abbr>" veya "<abbr title="Route: Yönlendirme/Yön">route</abbr>" olarak adlandırılır.

    * `name` adında məcburi bir parametr olub olmadığını və əgər varsa, tipinin `str` olub olmadığını yoxlayacaq.
    * `price` adında məcburi bir parametr olub olmadığını və əgər varsa, tipinin `float` olub olmadığını yoxlayacaq.
    * `is_offer` adında <abbr title="Məcburi olmayan: Optional">məcburi olmayan</abbr> bir parametr olub olmadığını və əgər varsa, tipinin `float` olub olmadığını yoxlayacaq.

	//
	// Note that SortedList is used here because the istio sets class has no order guarantees,
	// and our unit tests will flake if rules have a nondeterministic ordering.
	// CLI: -t mangle -A ISTIO_PRERT -s 169.254.7.127 -p tcp -m tcp --dport <PROBEPORT> -j ACCEPT
	//
	// DESC: If this is one of our node-probe ports and is from our SNAT-ed/"special" hostside IP, short-circuit out here

     *   <li>If this field's value is some other thread object, we know that it's not our thread.
     *   <li>If this field's value == null because it originally belonged to another thread and that
     *       thread cleared it, we still know that it's not associated with our thread
     *   <li>If this field's value == null because it was associated with our thread and was
     *       cleared, we know that we're not executing inline any more

# Yardım

 *       <i>compile</i> against Android. Now, this might be an artifact of our build system, one
 *       that we could probably work around. Or we could manually strip the test from open-source
 *       Guava while continuing to run it internally, as we do with many other tests. This would
 *       suffice because we our Android users and tests are using the open-source version, which

## Architecture Standards

**Experimental!**

We'd like to capture our architectural decisions about the build tool as [Architectural Decision Records (ADRs)](https://adr.github.io/).
For now we just have this global repository of ADRs.
If we see fit, we can break these out to per-platform ones, or keep a hybrid approach to having global and platform-specific ADSs.

Our aim is to keep the process lightweight and approachable.

- For in-depth information about how to use Istio, visit [istio.io](https://istio.io)
- To ask questions and get assistance from our community, visit [GitHub Discussions](https://github.com/istio/istio/discussions)

 *       <i>compile</i> against Android. Now, this might be an artifact of our build system, one
 *       that we could probably work around. Or we could manually strip the test from open-source
 *       Guava while continuing to run it internally, as we do with many other tests. This would
 *       suffice because we our Android users and tests are using the open-source version, which