# Exceptions - `HTTPException` and `WebSocketException`

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`

For now, you just need to know that `Annotated` exists, and that it's standard Python. 😎

Later you will see how **powerful** it can be.

/// tip

### <a href="https://www.django-rest-framework.org/" class="external-link" target="_blank">Django REST Framework</a>

Фреймворк Django REST був створений як гнучкий інструментарій для створення веб-інтерфейсів API використовуючи Django в основі, щоб покращити його можливості API.

  round(query, by=0.01):
    'round(%s, %s)' % [query, by],
  quantile(quantile, query):
    'histogram_quantile(%s, %s)' %[quantile, query],
  labels(metric_name, labels):
    // One can nest locals.
    // Every local ends with a semi-colon.
    local prom_labels = std.join(',',
      std.map(
        function(k)
          if std.startsWith(labels[k], "!~") then

		if assignBack.Index > 0 {
			reflect.Indirect(assignBack.Dest).Set(fieldValue.Index(assignBack.Index - 1))
		} else {
			reflect.Indirect(assignBack.Dest).Set(fieldValue)
		}
	}
}

func (association *Association) buildCondition() *DB {
	var (

        return this.username;
    }


    /**
     * Returns the password in plain text or <tt>null</tt> if the raw password
     * hashes were used to construct this <tt>NtlmPasswordAuthentication</tt>
     * object which will be the case when NTLM HTTP Authentication is
     * used. There is no way to retrieve a users password in plain text unless
     * it is supplied by the user at runtime.
     * 
     * @return the password

func statUnix(fi fs.FileInfo, h *Header, doNameLookups bool) error {
	sys, ok := fi.Sys().(*syscall.Stat_t)
	if !ok {
		return nil
	}
	h.Uid = int(sys.Uid)
	h.Gid = int(sys.Gid)
	if doNameLookups {
		// Best effort at populating Uname and Gname.
		// The os/user functions may fail for any number of reasons
		// (not implemented on that platform, cgo not enabled, etc).
		if u, ok := userMap.Load(h.Uid); ok {
			h.Uname = u.(string)

		signatureVersion = signV4Algorithm
	}

	var authtype string
	switch authType {
	case authTypePresignedV2, authTypePresigned:
		authtype = "REST-QUERY-STRING"
	case authTypeSignedV2, authTypeSigned, authTypeStreamingSigned:
		authtype = "REST-HEADER"
	case authTypePostPolicy:
		authtype = "POST"
	}

	args := map[string][]string{
		"CurrentTime":      {currTime.Format(time.RFC3339)},

### <a href="https://www.django-rest-framework.org/" class="external-link" target="_blank">Django REST Framework</a>

Django REST framework foi criado para ser uma caixa de ferramentas flexível para construção de APIs web utilizando Django por baixo, para melhorar suas capacidades de API.

    void assembleModelInheritance(Model child, Model parent);

    void assembleBuildInheritance(Build childBuild, Build parentBuild, boolean handleAsInheritance);

    void copyModel(Model dest, Model source);