## Parameterize the instance { #parameterize-the-instance }

And now, we can use `__init__` to declare the parameters of the instance that we can use to "parameterize" the dependency:

{* ../../docs_src/dependencies/tutorial011_an_py39.py hl[9] *}

In this case, **FastAPI** won't ever touch or care about `__init__`, we will use it directly in our code.

<a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS" class="external-link" target="_blank">CORS or "Cross-Origin Resource Sharing"</a> refers to the situations when a frontend running in a browser has JavaScript code that communicates with a backend, and the backend is in a different "origin" than the frontend.

## Origin { #origin }

## Code size { #code-size }

This example might seem verbose. Keep in mind that we are mixing security, data models, utility functions and *path operations* in the same file.

But here's the key point.

The security and dependency injection stuff is written once.

And you can make it as complex as you want. And still, have it written only once, in a single place. With all the flexibility.

* The `--node-name` flag for kubeadm now dictates the Node API object name the kubelet uses for registration, in all cases but where you might use an in-tree cloud provider. If you're not using an in-tree cloud provider, `--node-name` will set the Node API object name. If you're using an in-tree cloud provider, you MUST make `--node-name` match the name the in-tree cloud provider decides to use.

<img src="/img/tutorial/generate-clients/image01.png">

Sie können diese Schemas sehen, da sie mit den Modellen in der Anwendung deklariert wurden.

Diese Informationen sind im **OpenAPI-Schema** der Anwendung verfügbar und werden dann in der API-Dokumentation angezeigt (von Swagger UI).

_2014-05-23_

 * Offer bridges to make it easier to migrate from OkHttp 1.x to OkHttp 2.0.
   This adds `OkUrlFactory`, `Cache`, and `@Deprecated` annotations for APIs
   dropped in 2.0.

## Version 1.5.4

_2014-04-14_

 * Drop ALPN support in Android. There's a concurrency bug in all
   currently-shipping versions.
 * Support asynchronous disconnects by breaking the socket only. This should

   * OkHttp in the current runtime. Use this to include the OkHttp version in custom `User-Agent`
   * headers.
   *
   * Official OkHttp releases follow [semantic versioning][semver]. Versions with the `-SNAPSHOT`
   * qualifier are not unique and should only be used in development environments. If you create

But documentation is still missing. Then APISpec was created.

It is a plug-in for many frameworks (and there's a plug-in for Starlette too).

The way it works is that you write the definition of the schema using YAML format inside the docstring of each function handling a route.

And it generates OpenAPI schemas.

That's how it works in Flask, Starlette, Responder, etc.

    static String queryLookup(final String query, final String param) {
        final char in[] = query.toCharArray();
        int i, ch, st, eq;

        st = eq = 0;
        for (i = 0; i < in.length; i++) {
            ch = in[i];
            if (ch == '&') {
                if (eq > st) {
                    final String p = new String(in, st, eq - st);
                    if (p.equalsIgnoreCase(param)) {

    # via -r ci/official/requirements_updater/requirements.in

# The following packages are considered to be unsafe in a requirements file:
setuptools==78.1.1 \
    --hash=sha256:c3a9c4211ff4c309edb8b8c4f1cbfa7ae324c4ba9f91ff254e3d305b9fd54561 \
    --hash=sha256:fcc17fd9cd898242f6b4adfaca46137a9edef687f43e6f78469692a5e70d851d
    # via
    #   -r ci/official/requirements_updater/requirements.in