`It's a friend of mine--a Cheshire Cat,' said Alice:  `allow me
to introduce it.'

  `I don't like the look of it at all,' said the King:
`however, it may kiss my hand if it likes.'

  `I'd rather not,' the Cat remarked.

  `Don't be impertinent,' said the King, `and don't look at me
like that!'  He got behind Alice as he spoke.

  `A cat may look at a king,' said Alice.  `I've read that in

  `It's a friend of mine--a Cheshire Cat,' said Alice:  `allow me
to introduce it.'

  `I don't like the look of it at all,' said the King:
`however, it may kiss my hand if it likes.'

  `I'd rather not,' the Cat remarked.

  `Don't be impertinent,' said the King, `and don't look at me
like that!'  He got behind Alice as he spoke.

  `A cat may look at a king,' said Alice.  `I've read that in

=== "Python 3.10+"

    ```Python hl_lines="18-19"
    {!> ../../../docs_src/extra_data_types/tutorial001_an_py310.py!}
    ```

=== "Python 3.9+"

    ```Python hl_lines="18-19"
    {!> ../../../docs_src/extra_data_types/tutorial001_an_py39.py!}
    ```

=== "Python 3.8+"

    ```Python hl_lines="19-20"

```Python hl_lines="2  7  9"
{!../../../docs_src/custom_response/tutorial006c.py!}
```

### `StreamingResponse`

Takes an async generator or a normal generator/iterator and streams the response body.

```Python hl_lines="2  14"
{!../../../docs_src/custom_response/tutorial007.py!}
```

#### Using `StreamingResponse` with file-like objects

=== "Python 3.10+"

    ```Python hl_lines="4  78"
    {!> ../../../docs_src/security/tutorial003_an_py310.py!}
    ```

=== "Python 3.9+"

    ```Python hl_lines="4  78"
    {!> ../../../docs_src/security/tutorial003_an_py39.py!}
    ```

=== "Python 3.8+"

    ```Python hl_lines="4  79"
    {!> ../../../docs_src/security/tutorial003_an.py!}
    ```

=== "Python 3.9+"

    ```Python hl_lines="4  8  12"
    {!> ../../../docs_src/security/tutorial006_an_py39.py!}
    ```

=== "Python 3.8+"

    ```Python hl_lines="2  7  11"
    {!> ../../../docs_src/security/tutorial006_an.py!}
    ```

=== "Python 3.8+ non-Annotated"

    !!! tip
        Prefer to use the `Annotated` version if possible.

    ```Python hl_lines="2  6  10"

In a very simplistic way create the database tables:

```Python hl_lines="9-11"
{!../../../docs_src/sql_databases_peewee/sql_app/main.py!}
```

### Create a dependency

Create a dependency that will connect the database right at the beginning of a request and disconnect it at the end:

```Python hl_lines="23-29"
{!../../../docs_src/sql_databases_peewee/sql_app/main.py!}
```

=== "Python 3.10+"

    ```Python hl_lines="62-65"
    {!> ../../../docs_src/security/tutorial005_an_py310.py!}
    ```

=== "Python 3.9+"

    ```Python hl_lines="62-65"
    {!> ../../../docs_src/security/tutorial005_an_py39.py!}
    ```

=== "Python 3.8+"

    ```Python hl_lines="63-66"
    {!> ../../../docs_src/security/tutorial005_an.py!}
    ```

       for the change (usually before you start working on it).  Trivial changes like typos do not
       require a JIRA issue. Your pull request should address just this issue, without
       pulling in other changes.
 - [ ] Each commit in the pull request should have a meaningful subject line and body.
 - [ ] Format the pull request title like `[MNG-XXX] SUMMARY`,
       where you replace `MNG-XXX` and `SUMMARY` with the appropriate JIRA issue.

<abbr title="too long; didn't read"><strong>TL;DR:</strong></abbr>

If you are using third party libraries that tell you to call them with `await`, like:

```Python
results = await some_library()
```

Then, declare your *path operation functions* with `async def` like:

```Python hl_lines="2"
@app.get('/')
async def read_results():
    results = await some_library()
    return results
```

!!! note