Using an option directly from Starlette you can declare a *path parameter* containing a *path* using a URL like:

```
/files/{file_path:path}
```

In this case, the name of the parameter is `file_path`, and the last part, `:path`, tells it that the parameter should match any *path*.

So, you can use it with:

{* ../../docs_src/path_params/tutorial004_py39.py hl[6] *}

/// tip

{* ../../docs_src/events/tutorial003_py39.py hl[14:19] *}

The first part of the function, before the `yield`, will be executed **before** the application starts.

And the part after the `yield` will be executed **after** the application has finished.

### Async Context Manager { #async-context-manager }

/// note

If you already know what HTTP status codes are, skip to the next section.

///

In HTTP, you send a numeric status code of 3 digits as part of the response.

These status codes have a name associated to recognize them, but the important part is the number.

In short:

* `100 - 199` are for "Information". You rarely use them directly.  Responses with these status codes cannot have a body.

    similar, and get the two parts `items` and `read`. Many applications do that to
    group and organize permissions, you could do it as well in your application, just
    know that that it is application specific, it's not part of the specification.
    """

    def __init__(
        self,
        *,
        grant_type: Annotated[
            Union[str, None],
            Form(pattern="^password$"),
            Doc(

        ////
        »»»


### Headings

Every Markdown heading in the English text (all levels) ends with a part inside curly brackets. This part denotes the hash of this heading, which is used in links to this heading. In translations, translate the heading, but do not translate this hash part, so that links do not break.

Examples of how to translate a heading:

    Source (English):

        «««

# Query Parameters { #query-parameters }

When you declare other function parameters that are not part of the path parameters, they are automatically interpreted as "query" parameters.

{* ../../docs_src/query_params/tutorial001_py39.py hl[9] *}

The query is the set of key-value pairs that go after the `?` in a URL, separated by `&` characters.

For example, in the URL:

```
http://127.0.0.1:8000/items/?skip=0&limit=10
```

You can help with everything on [Help FastAPI - Get Help](./help-fastapi.md){.internal-link target=_blank} the same ways as external contributors. But additionally, there are some tasks that only you (as part of the team) can perform.

Here are the general instructions for the tasks you can perform.

Thanks a lot for your help. 🙇

## Be Nice

First of all, be nice. 😊

        »»»

    Do NOT translate with (German):

        «««
        ### Führen Sie Ihr Programm aus { #run-your-program }
        »»»

2) Make sure that the translated part of the heading does not end with a period.

Example:

    Source (English):

        «««
        ## Another module with `APIRouter` { #another-module-with-apirouter }
        »»»

e&dna?gnir?nner??les?ælk??dra&b?eb??g&nasrop?vi?ŋásrop??j&daehal&a?á??jedub?v&arekkhar?árekkhár???ksiouf?n&diaegadvoug?taed???v&irp?lesl&am?åm???y&b&essen?nart?sebel?tsev??o&d&ar?na!s??or??gavtsev?ksa?lem?mrak?n&art?n&if?orb???r&a&mah?n?v??e&dni?t&so?ton??va??ul?yd??s&am?enner?gav?lrak?tivk??vrejks??ø&d&ar?na!s??ør??gåvtsev?ksa?lem?mrak?n&art?n&if?ørb???r&e&dni?t&so?tøn??va??ul?yd?æ&n?v???s&enner?gåv?tivk?åm??vrejks???á&slág?tlá?vreiks??å&gåv?h?jddådåb?lf??ø&d&ob?rav??r&egark?olf??s&dav?mort????...

It will have a *path operation* that will receive an `Invoice` body, and a query parameter `callback_url` that will contain the URL for the callback.

This part is pretty normal, most of the code is probably already familiar to you:

{* ../../docs_src/openapi_callbacks/tutorial001_py310.py hl[7:11,34:51] *}

/// tip