## Как это выглядит

Давайте сначала просто воспользуемся кодом и посмотрим, как он работает, а затем детально разберём, что происходит.

## Создание `main.py`

Скопируйте пример в файл `main.py`:

//// tab | Python 3.9+

```Python
{!> ../../docs_src/security/tutorial001_an_py39.py!}
```

////

//// tab | Python 3.8+

```Python

                            "description": "Successful Response",
                            "content": {"application/json": {"schema": {}}},
                        }
                    },
                    "summary": "Main",
                    "operationId": "main__get",
                }
            },
        },
        "components": {
            "schemas": {
                "Body_create_upload_files_uploadfiles__post": {

        if (link == null) continue; // URL is either invalid or its scheme isn't http/https.
        queue.add(link.newBuilder().fragment(null).build());
      }
    }
  }

  public static void main(String[] args) throws IOException {
    if (args.length != 2) {
      System.out.println("Usage: Crawler <cache dir> <root>");
      return;
    }

    int threadCount = 20;

    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;

// reducing the # of rules we need.
//
// BUT netlink lib doesn't support adding things to `list:set` types yet, and current tagged release
// doesn't support creating `list:set` types yet (is in main branch tho).
// So this will actually create 2 underlying ipsets, one for v4 and one for v6
func NewIPSet(name string, v6 bool, deps NetlinkIpsetDeps) (IPSet, error) {
	var err error
	set := IPSet{

然后它会使用你的 **FastAPI** 代码开启服务器，停在断点处，等等。

看起来可能是这样：

<img src="/img/tutorial/debugging/image01.png">

---

如果使用 Pycharm，你可以：

* 打开「运行」菜单。
* 选中「调试...」。
* 然后出现一个上下文菜单。
* 选择要调试的文件（本例中的 `main.py`）。

然后它会使用你的 **FastAPI** 代码开启服务器，停在断点处，等等。

看起来可能是这样：

## Rode o código

Todos os blocos de código podem ser copiados e utilizados diretamente (eles são, na verdade, arquivos Python testados).

Para rodar qualquer um dos exemplos, copie o codigo para um arquivo `main.py`, e inicie o `uvivorn` com:

<div class="termy">

```console
$ uvicorn main:app --reload

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

                            },
                        },
                    },
                }
            },
            "/": {
                "get": {
                    "summary": "Main",
                    "operationId": "main__get",
                    "responses": {
                        "200": {
                            "description": "Successful Response",

      if (!response.isSuccessful()) throw new IOException("Unexpected code " + response);

      System.out.println(response.body().string());
    }
  }

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

  private static class ProgressResponseBody extends ResponseBody {

    private final ResponseBody responseBody;

import okhttp3.survey.types.Client
import okhttp3.survey.types.SuiteId
import okio.FileSystem
import okio.Path.Companion.toPath
import org.conscrypt.Conscrypt

@Suppress("ktlint:standard:property-naming")
suspend fun main() {
  val includeConscrypt = false

  val client =
    OkHttpClient.Builder()
      .cache(Cache(FileSystem.SYSTEM, "build/okhttp_cache".toPath(), 100_000_000))
      .build()