@router_a_a.get("/override", response_class=PlainTextResponse)
def get_a_a_path_override():
    return "Hello A A"


@router_a_b_override.get("/")
def get_a_b():
    return "Hello A B"


@router_a_b_override.get("/override", response_class=HTMLResponse)
def get_a_b_path_override():
    return "Hello A B"


@router_b_override.get("/")
def get_b():
    return "Hello B"

			a[j+1] = b[j+1]
		}
	}
}

func BenchmarkCompareBytesEqual(b *testing.B) {
	b1 := []byte("Hello Gophers!")
	b2 := []byte("Hello Gophers!")
	for i := 0; i < b.N; i++ {
		if Compare(b1, b2) != 0 {
			b.Fatal("b1 != b2")
		}
	}
}

func BenchmarkCompareBytesToNil(b *testing.B) {
	b1 := []byte("Hello Gophers!")
	var b2 []byte
	for i := 0; i < b.N; i++ {
		if Compare(b1, b2) != 1 {

@app.get("/items/")
async def read_items(commons: dict = Depends(common_parameters)):
    return {"message": "Hello Items!", "params": commons}


@app.get("/users/")
async def read_users(commons: dict = Depends(common_parameters)):
    return {"message": "Hello Users!", "params": commons}


client = TestClient(app)


async def override_dependency(q: str | None = None):

$ echo "Hello $MY_NAME"

Hello Wade Wilson
```

</div>

////

//// tab | Windows PowerShell

<div class="termy">

```console
// Erstellen Sie eine Umgebungsvariable MY_NAME
$ $Env:MY_NAME = "Wade Wilson"

// Verwenden Sie sie mit anderen Programmen, etwa
$ echo "Hello $Env:MY_NAME"

Hello Wade Wilson
```

</div>

////

@router_a_a.get("/override", response_class=PlainTextResponse)
def get_a_a_path_override():
    return "Hello A A"


@router_a_b_override.get("/")
def get_a_b():
    return "Hello A B"


@router_a_b_override.get("/override", response_class=HTMLResponse)
def get_a_b_path_override():
    return "Hello A B"


@router_b_override.get("/")
def get_b():
    return "Hello B"

// Then you could use it with other programs, like
$ echo "Hello $MY_NAME"

Hello Wade Wilson
```

</div>

////

//// tab | Windows PowerShell

<div class="termy">

```console
// Create an env var MY_NAME
$ $Env:MY_NAME = "Wade Wilson"

// Use it with other programs, like
$ echo "Hello $Env:MY_NAME"

Hello Wade Wilson
```

</div>

////

## 파이썬에서 환경 변수 읽기

$ export MY_NAME="Wade Wilson"

// 然后，你可以在其他程序中使用它，例如
$ echo "Hello $MY_NAME"

Hello Wade Wilson
```

</div>

////

//// tab | Windows PowerShell

<div class="termy">

```console
// 创建一个名为 MY_NAME 的环境变量
$ $Env:MY_NAME = "Wade Wilson"

// 在其他程序中使用它，例如
$ echo "Hello $Env:MY_NAME"

Hello Wade Wilson
```

</div>

////

## 在 Python 中读取环境变量

    app = FastAPI()
    router = APIRouter()

    @router.get("/hello/")
    def hello_page() -> str:
        return "Hello, World!"

    app.include_router(router)

    client = TestClient(app)

    response = client.get("/hello/", follow_redirects=False)
    assert response.status_code == 200

    response = client.get("/hello", follow_redirects=False)
    assert response.status_code == 307

from fastapi import FastAPI

app = FastAPI()


@app.get("/app")
def read_main():
    return {"message": "Hello World from main app"}


subapi = FastAPI()


@subapi.get("/sub")
def read_sub():
    return {"message": "Hello World from sub API"}

    "path",
    ["/optional-str", "/model-optional-str"],
)
def test_optional_str(path: str):
    client = TestClient(app)
    response = client.get(path, headers={"p": "hello"})
    assert response.status_code == 200
    assert response.json() == {"p": "hello"}


# =====================================================================================
# Alias


@app.get("/optional-alias")
async def read_optional_alias(