```Python
from fastapi import FastAPI

app = FastAPI()


@app.get("/")
def read_root():
    return {"Hello": "World"}


@app.get("/items/{item_id}")
def read_item(item_id: int, q: str | None = None):
    return {"item_id": item_id, "q": q}
```

### Dockerfile { #dockerfile }

现在在同一个项目目录下创建 `Dockerfile` 文件：

```{ .dockerfile .annotate }
# (1)!
FROM python:3.14

# (2)!

        assertEquals("", root.childText("description"), "Should get empty description text");

        // Test getting text from non-existing element
        assertNull(root.childText("nonexistent"), "Should return null for non-existing element");
    }

    @Test
    void testAddGAVElements() throws Exception {
        String pomXml = """
            <?xml version="1.0" encoding="UTF-8"?>

// expression represented by an ASTNode. Only one of the fields is
// non-nil.
//
// In cases where we are fetching data from a data source (like csv),
// the type may not be determined yet. In these cases, a byte-slice is
// used.
type Value struct {
	value any
}

// Missing is used to indicate a non-existing value.
type Missing struct{}

// MarshalJSON provides json marshaling of values.

	instructions["JP"] = x86.AJPS   /* alternate */
	instructions["JPC"] = x86.AJPC  /* parity clear (PF = 0) */
	instructions["JPE"] = x86.AJPS  /* alternate */
	instructions["JPL"] = x86.AJPL  /* non-negative (plus) (SF = 0) */
	instructions["JPO"] = x86.AJPC  /* alternate */
	instructions["JPS"] = x86.AJPS  /* parity set (PF = 1) */
	instructions["JS"] = x86.AJMI   /* alternate */

```Python
from fastapi import FastAPI

app = FastAPI()


@app.get("/")
def read_root():
    return {"Hello": "World"}


@app.get("/items/{item_id}")
def read_item(item_id: int, q: str | None = None):
    return {"item_id": item_id, "q": q}
```

### Dockerfile { #dockerfile }

Ahora, en el mismo directorio del proyecto, crea un archivo `Dockerfile` con:

```{ .dockerfile .annotate }
# (1)!

```Python
from fastapi import FastAPI

app = FastAPI()


@app.get("/")
def read_root():
    return {"Hello": "World"}


@app.get("/items/{item_id}")
def read_item(item_id: int, q: str | None = None):
    return {"item_id": item_id, "q": q}
```

### Dockerfile { #dockerfile }

Erstellen Sie nun im selben Projektverzeichnis eine Datei `Dockerfile` mit:

```{ .dockerfile .annotate }
# (1)!

  }

  private <T> void assertNextPermutation(
      List<T> expectedPermutation, Iterator<List<T>> permutations) {
    assertTrue("Expected another permutation, but there was none.", permutations.hasNext());
    assertEquals(expectedPermutation, permutations.next());
  }

  private <T> void assertNoMorePermutations(Iterator<List<T>> permutations) {

이는 **FastAPI**의 한계가 아니라, HTTP 프로토콜에 의한 것입니다.

///

## 선택적 파일 업로드 { #optional-file-upload }

표준 타입 애너테이션을 사용하고 기본값을 `None`으로 설정하여 파일을 선택적으로 만들 수 있습니다:

{* ../../docs_src/request_files/tutorial001_02_an_py310.py hl[9,17] *}

## 추가 메타데이터를 포함한 `UploadFile` { #uploadfile-with-additional-metadata }

	newSignature := getSignature(signingKey, stringToSign)

	// Verify if signature match.
	if !compareSignatureV4(newSignature, signV4Values.Signature) {
		return ErrSignatureDoesNotMatch
	}

	// Return error none.
	return ErrNone

PEM encoded files for keys and certificates for the tests or for setting up TLS in a test cluster.
Also, when in FIPS 140 mode, hostname verification for TLS cannot be turned off so if you are using
`*.verification_mode: none` , you'd need to mute the test in fips mode.

When using TLS, ensure that private keys used are longer than 2048 bits, or mute the test in fips mode.

==== Password hashing algorithm