{* ../../docs_src/response_model/tutorial002_py310.py hl[16] *}

Artık bir browser password ile user oluşturduğunda, API response içinde aynı password’ü geri döndürecek.

Bu örnekte sorun olmayabilir; çünkü password’ü gönderen kullanıcı zaten aynı kişi.

Ancak aynı modeli başka bir *path operation* için kullanırsak, kullanıcının password’lerini her client’a gönderiyor olabiliriz.

/// danger

			writeErrorResponseJSON(ctx, w, apiErr, r.URL)
			return
		}
	}

	// Check if we are creating svc account for request sender.
	isSvcAccForRequestor := targetUser == requestorUser || targetUser == requestorParentUser

	// If we are creating svc account for request sender, ensure
	// that targetUser is a real user (i.e. not derived
	// credentials).
	if isSvcAccForRequestor {
		if requestorIsDerivedCredential {

github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd h1:TRLaZ9cD/w8PVh93nsPXa1VrQ6jlwL5oN8l14QlcNfg=
github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=

   *       <ul>
   *         <li>UNSET, meaning "null pointer"
   *         <li>one plus an index into the entries and elements array
   *       </ul>
   *   <li>another java.util.Set delegate implementation. In most modern JDKs, normal java.util hash
   *       collections intelligently fall back to a binary search tree if hash table collisions are
   *       detected. Rather than going to all the trouble of reimplementing this ourselves, we

MySQL veya PostgreSQL gibi ilişkisel veritabanlarıyla nispeten sıkı bağlıdır, bu nedenle Couchbase, MongoDB, Cassandra vb. gibi bir NoSQL veritabanını ana depolama motoru olarak kullanmak pek kolay değildir.

* [**ReDoc**](https://github.com/Rebilly/ReDoc)을 이용한 대체 API 문서화.

![ReDoc](https://fastapi.tiangolo.com/img/index/index-06-redoc-02.png)

### 그저 현대 파이썬 { #just-modern-python }

(Pydantic 덕분에) 모든 것이 표준 **Python 타입** 선언을 기반으로 합니다. 새로 배울 문법이 없습니다. 그저 표준적인 현대 파이썬입니다.

Python 타입을 어떻게 사용하는지 2분 정도 복습이 필요하다면(FastAPI를 사용하지 않더라도), 다음의 짧은 자습서를 확인하세요: [Python 타입](python-types.md).

---

"_If you're looking to learn one **modern framework** for building REST APIs, check out **FastAPI** [...] It's fast, easy to use and easy to learn [...]_"

"_We've switched over to **FastAPI** for our **APIs** [...] I think you'll like it [...]_"

       * AGP: https://github.com/google/guava/issues/7769.
       *
       * My impression is that an AtomicReferenceFieldUpdater in a static field is similarly fast to
       * Unsafe on modern JVMs (if perhaps not quite as fast as VarHandle?). However, I'm not sure
       * exactly what we've benchmarked, and we certainly haven't benchmarked as far back as JDK 8.

     * '$' in the name. This method may return false for a top-level class that's intentionally
     * named with the '$' character. If this is a concern, you could use {@link #load} and then
     * check on the loaded {@link Class} object instead.
     *
     * @since 30.1
     */
    public boolean isTopLevel() {
      return className.indexOf('$') == -1;

   *       <ul>
   *         <li>UNSET, meaning "null pointer"
   *         <li>one plus an index into the entries and elements array
   *       </ul>
   *   <li>another java.util.Set delegate implementation. In most modern JDKs, normal java.util hash
   *       collections intelligently fall back to a binary search tree if hash table collisions are
   *       detected. Rather than going to all the trouble of reimplementing this ourselves, we