│       └── admin.py
```

/// tip | Consejo

Hay varios archivos `__init__.py`: uno en cada directorio o subdirectorio.

Esto es lo que permite importar código de un archivo a otro.

Por ejemplo, en `app/main.py` podrías tener una línea como:

```
from app.routers import items
```

///

                assertEquals(it.unitTests, File(dir, "src/test").isDirectory, "${it.name}'s unitTests is wrong!")
                assertEquals(it.functionalTests, File(dir, "src/integTest").isDirectory, "${it.name}'s functionalTests is wrong!")
                assertEquals(
                    it.crossVersionTests,
                    File(dir, "src/crossVersionTest").isDirectory,
                    "${it.name}'s crossVersionTests is wrong!",

```Python
contents = myfile.file.read()
```

/// note | `async` Technical Details

When you use the `async` methods, **FastAPI** runs the file methods in a threadpool and awaits for them.

///

/// note | Starlette Technical Details

Remember that dependencies can have sub-dependencies?

`get_current_user` will have a dependency with the same `oauth2_scheme` we created before.

The same as we were doing before in the *path operation* directly, our new dependency `get_current_user` will receive a `token` as a `str` from the sub-dependency `oauth2_scheme`:

{* ../../docs_src/security/tutorial002_an_py310.py hl[25] *}

## Get the user { #get-the-user }

            String link = linkMatcher.group(1);
            File referencedFile = new File(getJavadocRoot().get().getAsFile(), link);
            if (!referencedFile.exists() || referencedFile.isDirectory()) {
                String errMsg = "Missing Javadoc file for " + link + " in " + sourceFile.getName();
                if (link.startsWith("javadoc")) {

You can declare a parameter in a *path operation function* or dependency to be of type `Response` and then you can set data for the response like headers or cookies.

You can also use it directly to create an instance of it and return it from your *path operations*.

You can import it directly from `fastapi`:

```python
from fastapi import Response
```

```

De esta manera, cuando escribes `python` en la terminal, el sistema encontrará el programa Python en `/opt/custompython/bin` (el último directorio) y usará ese.

////

//// tab | Windows

Digamos que instalas Python y termina en un directorio `C:\opt\custompython\bin`.

## `Depends()`

Dependencies are handled mainly with the special function `Depends()` that takes a callable.

Here is the reference for it and its parameters.

You can import it directly from `fastapi`:

```python
from fastapi import Depends
```

::: fastapi.Depends

## `Security()`

///

## Run your code with your debugger { #run-your-code-with-your-debugger }

Because you are running the Uvicorn server directly from your code, you can call your Python program (your FastAPI application) directly from the debugger.

---

For example, in Visual Studio Code, you can:

* Go to the "Debug" panel.
* "Add configuration...".
* Select "Python"

    * It's mainly syntax sugar, a convenience for developer experience.
    * Now `Request`, `Response`, `WebSocket`, `status` can be imported directly from `fastapi` as in `from fastapi import Response`. This is because those are frequently used, to use the request directly, to set headers and cookies, to get status codes, etc.
    * Documentation changes in many places, but new docs and noticeable improvements: