keeping the package name the same: `okhttp3`!

There are three kinds of compatibility we’re tracking:

 * **Binary compatibility** is the ability to compile a program against OkHttp 3.x, and then to run
   it against OkHttp 4.x. We’re using the excellent [japicmp][japicmp] library via its
   [Gradle plugin][japicmp_gradle] to enforce binary compatibility.

#### A "professional" attack { #a-professional-attack }

Of course, the attackers would not try all this by hand, they would write a program to do it, possibly with thousands or millions of tests per second. And they would get just one extra correct letter at a time.

{* ../../docs_src/python_types/tutorial001.py hl[2] *}


### Düzenle

Bu çok basit bir program.

Ama şimdi sıfırdan yazdığınızı hayal edin.

Bir noktada fonksiyonun tanımına başlayacaktınız, parametreleri hazır hale getirdiniz...

Ama sonra "ilk harfi büyük harfe dönüştüren yöntemi" çağırmanız gerekir.

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.UnknownHostException;

/**
 * This class will allow a Java program to read and write data to Named
 * Pipes and Transact NamedPipes.
 *
 * <p>There are three Win32 function calls provided by the Windows SDK
 * that are important in the context of using jCIFS. They are:
 *
 * <ul>

///

## Motivation { #motivation }

Let's start with a simple example:

{* ../../docs_src/python_types/tutorial001_py39.py *}

Calling this program outputs:

```
John Doe
```

The function does the following:

* Takes a `first_name` and `last_name`.
* Converts the first letter of each one to upper case with `title()`.

        .isEqualTo(new File("/c:\\Documents ~ Settings, or not\\11-12 12:05"));
    assertThat(ClassPath.toFile(new URL("file:///C:\\Program Files\\Apache Software Foundation")))
        .isEqualTo(new File("/C:\\Program Files\\Apache Software Foundation/"));
    assertThat(ClassPath.toFile(new URL("file:///C:\\\u20320 \u22909"))) // Chinese Ni Hao
        .isEqualTo(new File("/C:\\\u20320 \u22909"));
  }

        .isEqualTo(new File("/c:\\Documents ~ Settings, or not\\11-12 12:05"));
    assertThat(ClassPath.toFile(new URL("file:///C:\\Program Files\\Apache Software Foundation")))
        .isEqualTo(new File("/C:\\Program Files\\Apache Software Foundation/"));
    assertThat(ClassPath.toFile(new URL("file:///C:\\\u20320 \u22909"))) // Chinese Ni Hao
        .isEqualTo(new File("/C:\\\u20320 \u22909"));
  }

    * If you know Python types you know how to use Pydantic.
* Plays nicely with your **<abbr title="Integrated Development Environment: similar to a code editor">IDE</abbr>/<abbr title="A program that checks for code errors">linter</abbr>/brain**:
    * Because pydantic data structures are just instances of classes you define; auto-completion, linting, mypy and your intuition should all work properly with your validated data.

* Kullandığın geliştirme araçları ile iyi çalışır **<abbr title="Integrated Development Environment, kod editörüne benzer">IDE</abbr>/<abbr title="Code errorlarınızı inceleyen program">linter</abbr>/brain**:
    * Pydantic'in veri yapıları aslında sadece senin tanımladığın classlar; Bu yüzden doğrulanmış dataların ile otomatik tamamlama, linting ve mypy'ı kullanarak sorunsuz bir şekilde çalışabilirsin

The **server** program (for example **Uvicorn** via **FastAPI CLI**) is capable of interpreting these headers, and then passing that information to your application.