For example, if you declare a parameter of type `Hero`, it will be read from the **JSON body**.

The same way, you can declare it as the function's **return type**, and then the shape of the data will show up in the automatic API docs UI.

{* ../../docs_src/sql_databases/tutorial001_an_py310.py ln[40:45] hl[40:45] *}

///

### Checking the current `root_path` { #checking-the-current-root-path }

You can get the current `root_path` used by your application for each request, it is part of the `scope` dictionary (that's part of the ASGI spec).

Here we are including it in the message just for demonstration purposes.

{* ../../docs_src/behind_a_proxy/tutorial001_py39.py hl[8] *}

Then, if you start Uvicorn with:

                                                           TF_DeleteStatus);

  TF_Tensor* tensor_shape = Int32Tensor({37, 1});
  TF_Operation* shape = Const(tensor_shape, func_graph.get(), s.get(), "shape");
  TF_Operation* random =
      RandomUniform(shape, TF_FLOAT, func_graph.get(), s.get());

  TF_Output outputs[] = {{random, 0}};
  *func = TF_GraphToFunction(func_graph.get(), name,

    }

    private Model interpolateModel(Model model, ModelBuildingRequest request, ModelProblemCollector problems) {
        // save profile activations before interpolation, since they are evaluated with limited scope
        List<Profile> originalProfiles = getProfiles(model);

        Model interpolatedModel =
                modelInterpolator.interpolateModel(model, model.getProjectDirectory(), request, problems);

</div>

Hypercorn 也支持 `--root-path `选项。

/// note | 技术细节

ASGI 规范定义的 `root_path` 就是为了这种用例。

并且 `--root-path` 命令行选项支持 `root_path`。

///

### 查看当前的 `root_path`

获取应用为每个请求使用的当前 `root_path`，这是 `scope` 字典的内容（也是 ASGI 规范的内容）。

我们在这里的信息里包含 `roo_path` 只是为了演示。

{* ../../docs_src/behind_a_proxy/tutorial001.py hl[8] *}

然后，用以下命令启动 Uvicorn：

<div class="termy">

```console

                val = interpolate(org);
                if (org != val) {
                    dependency.setClassifier(val);
                    dependency.clearManagementKey();
                }
                // Scope
                org = dependency.getScope();
                val = interpolate(org);
                if (org != val) {
                    dependency.setScope(val);
                }

{* ../../docs_src/security/tutorial005_an_py310.py hl[106,108:116] *}

## Verifique o `username` e o formato dos dados { #verify-the-username-and-data-shape }

Nós verificamos que nós obtemos um `username`, e extraímos os escopos.

                        // Example: project's compile starts after dependency's package completes
                        // TODO: String scope = ((Lifecycle.DependenciesPointer) pointer).scope();
                        projects.get(project)
                                .forEach(p -> plan.step(p, AFTER + n2).ifPresent(before::executeAfter));

## Pydantic models { #pydantic-models }

<a href="https://docs.pydantic.dev/" class="external-link" target="_blank">Pydantic</a> is a Python library to perform data validation.

You declare the "shape" of the data as classes with attributes.

And each attribute has a type.

///

### Проверка текущего `root_path` { #checking-the-current-root-path }

Вы можете получить текущий `root_path`, используемый вашим приложением для каждого запроса, — он входит в словарь `scope` (часть спецификации ASGI).

Здесь мы добавляем его в сообщение лишь для демонстрации.

{* ../../docs_src/behind_a_proxy/tutorial001_py39.py hl[8] *}

Затем, если вы запустите Uvicorn так: