These are the exceptions that you can raise to show errors to the client.

When you raise an exception, as would happen with normal Python, the rest of the execution is aborted. This way you can raise these exceptions from anywhere in the code to abort a request and show the error to the client.

You can use:

* `HTTPException`
* `WebSocketException`

type RESTMapperFunc func() (meta.RESTMapper, error)
type CategoryExpanderFunc func() (restmapper.CategoryExpander, error)

// RESTClient is a client helper for dealing with RESTful resources
// in a generic way.
type RESTClient interface {
	Get() *rest.Request
	Post() *rest.Request
	Patch(types.PatchType) *rest.Request
	Delete() *rest.Request
	Put() *rest.Request
}

 */

package org.gradle.internal.event;

import org.gradle.internal.service.scopes.Scope;
import org.gradle.internal.service.scopes.ServiceScope;

/**
 * Unified manager for all Gradle events.  Provides a simple way to find all listeners of a given type in the
 * system.
 *
 * <p>While the methods work with any Object, in general only interfaces should be used as listener types.
 *

//go:build gccgo

package issue9400

import (
	"runtime"
	"sync/atomic"
)

// The test for the gc compiler resets the stack pointer so that the
// stack gets modified.  We don't have a way to do that for gccgo
// without writing more assembly code, which we haven't bothered to
// do.  So this is not much of a test.

var Baton int32

func RewindAndSetgid() {
	atomic.StoreInt32(&Baton, 1)

But I'll show you how to improve that next. 🤓

## Custom Operation IDs and Better Method Names

You can **modify** the way these operation IDs are **generated** to make them simpler and have **simpler method names** in the clients.

#!/usr/bin/env bash
# Copyright 2020 The Go Authors. All rights reserved.
# Use of this source code is governed by a BSD-style
# license that can be found in the LICENSE file.

# A quick and dirty way to obtain code coverage from rulegen's main func. For
# example:
#
#     ./cover.bash && go tool cover -html=cover.out
#
# This script is needed to set up a temporary test file, so that we don't break
# regular 'go run .' usage to run the generator.

        loader.loadClass('string')

        then:
        ClassNotFoundException e = thrown()
        e.message == 'string not found.'
    }

    @Requires(UnitTestPreconditions.Jdk8OrEarlier)
    // todo: find a way to mock this in JDK 9+, where `getDefinedPackage` is final
    public void loadsPackageFromParentsInOrderSpecified() {
        def stringPackage = String.class.getPackage()
        def listPackage = List.class.getPackage()

	osInterface kubecontainer.OSInterface
}

// NewFakeHostStatsProvider provides a way to test with fake host statistics
func NewFakeHostStatsProvider() HostStatsProvider {
	return &fakeHostStatsProvider{
		osInterface: &kubecontainertest.FakeOS{},
	}
}

// NewFakeHostStatsProviderWithData provides a way to test with fake host statistics

# Body - Fields

The same way you can declare additional validation and metadata in *path operation function* parameters with `Query`, `Path` and `Body`, you can declare validation and metadata inside of Pydantic models using Pydantic's `Field`.

## Import `Field`

First, you have to import it:

=== "Python 3.10+"

    ```Python hl_lines="4"
    {!> ../../../docs_src/body_fields/tutorial001_an_py310.py!}
    ```

=== "Python 3.9+"

    That way you tell the editor that you are intentionally returning anything. But FastAPI will still do the data documentation, validation, filtering, etc. with the `response_model`.

### `response_model` Priority

If you declare both a return type and a `response_model`, the `response_model` will take priority and be used by FastAPI.