**FastAPI** provides the same `starlette.testclient` as `fastapi.testclient` just as a convenience for you, the developer. But it comes directly from Starlette.

///

/// tip

	if b != '\r' || err != nil {
		if cr.debug {
			fmt.Printf("want %q, got %q\n", "\r", string(b))
		}
		cr.err = errMalformedEncoding
		return n, cr.err
	}
	b, err = cr.reader.ReadByte()
	if err == io.EOF {
		err = io.ErrUnexpectedEOF
	}
	if err != nil {
		cr.err = err
		return n, cr.err
	}
	if b != '\n' {
		if cr.debug {
			fmt.Printf("want %q, got %q\n", "\r", string(b))
		}

          stale-pr-message: >
            This pull request has been automatically marked as stale because it has not had recent activity.
            It will be closed in 14 days if no further activity occurs.
            If you don't want the stale bot to close it, then set a milestone for it.
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          close-pr-message: >

/// tip

Do you want to understand what's all that above?

Continue reading. 👇🤓

///

## Why Virtual Environments { #why-virtual-environments }

To work with FastAPI you need to install <a href="https://www.python.org/" class="external-link" target="_blank">Python</a>.

After that, you would need to **install** FastAPI and any other **packages** you want to use.

You can import it directly from `fastapi`:

```python
from fastapi import Request
```

/// tip

When you want to define dependencies that should be compatible with both HTTP and WebSockets, you can define a parameter that takes an `HTTPConnection` instead of a `Request` or a `WebSocket`.

///

Let's look at how we can make that work.

## pytest.mark.anyio { #pytest-mark-anyio }

                    enabled = branch.enableVcsTriggers
                    // https://www.jetbrains.com/help/teamcity/2022.04/configuring-schedule-triggers.html#general-syntax-1
                    // We want it to be triggered only when there're pending changes in the specific vcs root, i.e. GradleMaster/GradleRelease
                    triggerRules = "+:root=${VersionedSettingsBranch.fromDslContext().vcsRootId()}:."

            // Try to call the expired method
            // Note: This method may fail in test environments due to system dependencies
            // but we mainly want to ensure the method signature is correct
            testTarget.expired();

            // If we get here, the method executed successfully
            assertTrue("expired method executed successfully", true);

# Reference

Here's the reference or code API, the classes, functions, parameters, attributes, and
all the FastAPI parts you can use in your applications.

If you want to **learn FastAPI** you are much better off reading the

   *
   * <p>If your data has no duplicates, or you wish to deduplicate elements, use {@code
   * ImmutableSortedSet.copyOf(elements)}; if you want a {@code List} you can use its {@code
   * asList()} view.
   *
   * <p><b>Java 8+ users:</b> If you want to convert a {@link java.util.stream.Stream} to a sorted
   * {@code ImmutableList}, use {@code stream.sorted().collect(toImmutableList())}.
   *