### Include a *path operation* { #include-a-path-operation }

We can also add *path operations* directly to the `FastAPI` app.

Here we do it... just to show that we can 🤷:

{* ../../docs_src/bigger_applications/app_an_py310/main.py hl[21:23] title["app/main.py"] *}

and it will work correctly, together with all the other *path operations* added with `app.include_router()`.

---

"_I’m over the moon excited about **FastAPI**. It’s so fun!_"

<div style="text-align: right; margin-right: 10%;">Brian Okken - <strong>[Python Bytes](https://pythonbytes.fm/episodes/show/123/time-to-right-the-py-wrongs?time_in_sec=855) podcast host</strong> <a href="https://x.com/brianokken/status/1112220079972728832"><small>(ref)</small></a></div>

---

---

„_Ich bin hellauf begeistert von **FastAPI**. Es macht so viel Spaß!_“

<div style="text-align: right; margin-right: 10%;">Brian Okken – <strong>[Python Bytes](https://pythonbytes.fm/episodes/show/123/time-to-right-the-py-wrongs?time_in_sec=855) Podcast-Host</strong> <a href="https://x.com/brianokken/status/1112220079972728832"><small>(Ref.)</small></a></div>

---

I'll show you some concrete examples in the next chapters.

---

Then the next concepts to consider are all about the program running your actual API (e.g. Uvicorn).

## Program and Process { #program-and-process }

      if (expectedOldCount != 0) {
        return false;
      } else if (newCount == 0) {
        return true;
      } else {
        // if our write lost the race, it must have lost to a nonzero value, so we can stop
        return countMap.putIfAbsent(element, new AtomicInteger(newCount)) == null;
      }
    }
    int oldValue = existingCounter.get();
    if (oldValue == expectedOldCount) {
      if (oldValue == 0) {

For example, if you declare a parameter of type `Hero`, it will be read from the **JSON body**.

The same way, you can declare it as the function's **return type**, and then the shape of the data will show up in the automatic API docs UI.

{* ../../docs_src/sql_databases/tutorial001_an_py310.py ln[40:45] hl[40:45] *}

	pingFrame := message{
		Op:         OpPing,
		DeadlineMS: uint32(connPingInterval.Milliseconds()),
		Payload:    make([]byte, pingMsg{}.Msgsize()),
	}

	defer ping.Stop()
	queue := make([][]byte, 0, maxMergeMessages)
	var queueSize int
	var buf bytes.Buffer
	var wsw wsWriter
	var lastSetDeadline time.Time

	// Helper to write everything in buf.

      client =
        client
          .newBuilder()
          // Set the bad override directly on the client
          .withOverride(badValue)
          .addInterceptor { chain ->
            // the only way to stop a bad override of a client is with a good override of an interceptor
            chain
              .run {
                if (testItFails) {
                  this
                } else {

# name-prepped away to nothing.
# U+200B, U+2060, and U+FEFF, are ignored
http://GOO\u200b\u2060\ufeffgoo.com  s:http p:/ h:googoo.com

# Ideographic full stop (full-width period for Chinese, etc.) should be
# treated as a dot.
# U+3002 is mapped to U+002E (dot)
http://www.foo\u3002bar.com  s:http p:/ h:www.foo.bar.com

# Invalid unicode characters should fail...

-   Changes are consistent with the [Coding Style](#c-coding-style).
-   Run the [unit tests](#running-unit-tests).

## How to become a contributor and submit your own code

![Screen Shot 2022-08-30 at 7 27 04 PM](https://user-images.githubusercontent.com/42785357/187579207-9924eb32-da31-47bb-99f9-d8bf1aa238ad.png)

### Typical Pull Request Workflow -

**1. New PR**