<span class="sponsor-badge">sponsor</span>
        <img class="sponsor-image" src="/img/sponsors/coderabbit-banner.png" />
      </a>
    </div>
    <div class="item">
      <a title="Making Retail Purchases Actionable for Brands and Developers" style="display: block; position: relative;" href="https://subtotal.com/?utm_source=fastapi&utm_medium=sponsorship&utm_campaign=open-source" target="_blank">

    // Private helper methods

    private int getMaxChannelsFromConfig(Configuration config) {
        // In a real implementation, this would read from configuration
        return 4; // Default to 4 channels
    }

    private LoadBalancingStrategy getLoadBalancingStrategyFromConfig(Configuration config) {
        // In a real implementation, this would read from configuration
        return LoadBalancingStrategy.ROUND_ROBIN;
    }

    img: https://fastapi.tiangolo.com/img/sponsors/coderabbit.png
  - url: https://subtotal.com/?utm_source=fastapi&utm_medium=sponsorship&utm_campaign=open-source
    title: The Gold Standard in Retail Account Linking
    img: https://fastapi.tiangolo.com/img/sponsors/subtotal.svg
  - url: https://docs.railway.com/guides/fastapi?utm_medium=integration&utm_source=docs&utm_campaign=fastapi

This would mean that **FastAPI** would expect a body similar to:

```JSON
{
    "name": "Foo",
    "description": "The pretender",
    "price": 42.0,
    "tax": 3.2,
    "tags": ["rock", "metal", "bar"],
    "image": {
        "url": "http://example.com/baz.jpg",
        "name": "The Foo live"
    }
}
```

Again, doing just that declaration, with **FastAPI** you get:

    @SuppressWarnings("nullness") // safe because we pass sort() a range that contains real Ts
    T[] castBuffer = (T[]) buffer;
    sort(castBuffer, 0, bufferSize, comparator);
    if (bufferSize > k) {
      Arrays.fill(buffer, k, buffer.length, null);
      bufferSize = k;
      threshold = buffer[k - 1];
    }
    // Up to bufferSize, all elements of buffer are real Ts (not null unless T includes null)

        // When: Request another connection
        // Note: Real SmbTransportImpl will report as disconnected without actual socket
        SmbTransportImpl second = testPool.getSmbTransport(ctx, address, 445, false);

        // Then: Will create new connection since real transport has no socket
        assertNotSame(first, second, "Should create new connection when first is disconnected");

///

/// info

In this example we use invented custom headers `X-Key` and `X-Token`.

But in real cases, when implementing security, you would get more benefits from using the integrated [Security utilities (the next chapter)](../security/index.md){.internal-link target=_blank}.

///

If you integrate your API with an OAuth2 provider, you will be able to authenticate and come back to the API docs with the acquired credentials. And interact with it using the real OAuth2 authentication.

Swagger UI will handle it behind the scenes for you, but it needs this "redirect" helper.

///

### Create a *path operation* to test it { #create-a-path-operation-to-test-it }

)
```

/// warning

The supporting additional functions `fake_password_hasher` and `fake_save_user` are just to demo a possible flow of the data, but they of course are not providing any real security.

///

## Reduce duplication { #reduce-duplication }

Reducing code duplication is one of the core ideas in **FastAPI**.

Sharma link: https://dev.to/paurakhsharma/microservice-in-python-using-fastapi-24cc title: Microservice in Python using FastAPI - author: Guillermo Cruz author_link: https://wuilly.com/ link: https://wuilly.com/2019/10/real-time-notifications-with-python-and-postgres/ title: Real-time Notifications with Python and Postgres - author: Navule Pavan Kumar Rao author_link: https://www.linkedin.com/in/navule/ link: https://www.tutlinks.com/create-and-deploy-fastapi-app-to-heroku/ title: Create and Deploy...