如果你不去停用 `philosophers-stone` 的虛擬環境，當你在終端中執行 `python` 時，它會嘗試使用 `philosophers-stone` 中的 Python。

<div class="termy">

```console
$ cd ~/code/prisoner-of-azkaban

$ python main.py

// 匯入 sirius 錯誤，未安裝 😱
Traceback (most recent call last):
    File "main.py", line 1, in <module>
        import sirius
```

</div>

但如果你停用虛擬環境並啟用 `prisoner-of-azkaban` 的新虛擬環境，那麼當你執行 `python` 時，它會使用 `prisoner-of-azkaban` 中虛擬環境的 Python。

如果你不去停用 `philosophers-stone` 的虚拟环境，当你在终端中运行 `python` 时，它会尝试使用 `philosophers-stone` 中的 Python。

<div class="termy">

```console
$ cd ~/code/prisoner-of-azkaban

$ python main.py

// 导入 sirius 报错，它没有安装 😱
Traceback (most recent call last):
    File "main.py", line 1, in <module>
        import sirius
```

</div>

但是如果你停用虚拟环境并激活 `prisoner-of-askaban` 的新虚拟环境，那么当你运行 `python` 时，它会使用 `prisoner-of-askaban` 中的虚拟环境中的 Python。

    /*
     * The main test thread tries to stop() the service shortly after
     * confirming that it is running. Meanwhile, the service itself is trying
     * to confirm that it is running. If the main thread's stop() call happens
     * before it has the chance, the test will fail. To avoid this, the main
     * thread calls this method, which waits until the service has performed

    /*
     * The main test thread tries to stop() the service shortly after
     * confirming that it is running. Meanwhile, the service itself is trying
     * to confirm that it is running. If the main thread's stop() call happens
     * before it has the chance, the test will fail. To avoid this, the main
     * thread calls this method, which waits until the service has performed

### Providing the `root_path` { #providing-the-root-path }

To achieve this, you can use the command line option `--root-path` like:

<div class="termy">

```console
$ fastapi run main.py --forwarded-allow-ips="*" --root-path /api/v1

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
```

</div>

### 提供 `root_path` { #providing-the-root-path }

为此，你可以像下面这样使用命令行选项 `--root-path`：

<div class="termy">

```console
$ fastapi run main.py --forwarded-allow-ips="*" --root-path /api/v1

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
```

</div>

如果你使用 Hypercorn，它也有 `--root-path` 选项。

</div>

**Not**: Tüm terminallerde çalıştığından emin olmak için `"fastapi[standard]"` ifadesini tırnak içinde yazdığınızdan emin olun.

## Örnek { #example }

### Oluşturalım { #create-it }

Şu içerikle `main.py` adında bir dosya oluşturalım:

```Python
from fastapi import FastAPI

app = FastAPI()


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

    try (Response response = client.newCall(request).execute()) {
      // Consume and discard the response body.
      response.body().source().readByteString();
    }
  }

  public static void main(String... args) throws Exception {
    new PrintEventsNonConcurrent().run();
  }

  private static final class PrintingEventListener extends EventListener {
    long callStartNanos;

  /*
   * Ideally, this class would have exposed only constructors that require a non-null cause. See
   * https://github.com/jspecify/jspecify-reference-checker/blob/61aafa4ae52594830cfc2d61c8b113009dbdb045/src/main/java/com/google/jspecify/nullness/NullSpecTransfer.java#L789
   * and https://github.com/jspecify/jspecify/issues/490.
   *
   * (That would also have ensured that its cause was always an Error, rather than possibly another

* [`Parameter Object`（規範）](https://github.com/OAI/OpenAPI-Specification/blob/main/versions/3.1.0.md#parameter-object)，對應到 FastAPI 的：
    * `Path()`
    * `Query()`
    * `Header()`
    * `Cookie()`
* [`Request Body Object` 中的 `content` 欄位裡的 `Media Type Object`（規範）](https://github.com/OAI/OpenAPI-Specification/blob/main/versions/3.1.0.md#media-type-object)，對應到 FastAPI 的：
    * `Body()`
    * `File()`
    * `Form()`