Python hat Unterstützung für optionale „Typhinweise“ (Englisch: „Type Hints“). Auch „Typ Annotationen“ genannt.

Diese **„Typhinweise“** oder -Annotationen sind eine spezielle Syntax, die es erlaubt, den <abbr title="Zum Beispiel: str, int, float, bool">Typ</abbr> einer Variablen zu deklarieren.

Durch das Deklarieren von Typen für Ihre Variablen können Editoren und Tools bessere Unterstützung bieten.

```Python hl_lines="4  9-12  25-27"
from typing import Union

from fastapi import FastAPI
from pydantic import BaseModel

app = FastAPI()


class Item(BaseModel):
    name: str
    price: float
    is_offer: Union[bool, None] = None


@app.get("/")
def read_root():
    return {"Hello": "World"}


@app.get("/items/{item_id}")
def read_item(item_id: int, q: Union[str, None] = None):

    "aliases" : { },
    "mappings" : {
      "file_config" : {
        "properties" : {
          "available" : {
            "type" : "boolean"
          },
          "boost" : {
            "type" : "float"
          },
          "configParameter" : {
            "type" : "keyword"
          },
          "createdBy" : {
            "type" : "keyword"
          },
          "createdTime" : {

    @CustomSize(maxKey = "form.admin.max.input.size")
    public String permissions;

    /** The boost score multiplier applied to elevated documents */
    @Required
    @ValidateTypeFailure
    public Float boost;

    /** The username of who created this elevate word entry */
    @Size(max = 1000)
    public String createdBy;

    /** The timestamp when this elevate word entry was created */
    @ValidateTypeFailure

)):b(a.jQuery)}(this,function(a){!function(a,b){"use strict";a.formUtils.registerLoadedModule("lang/sv"),a(b).bind("validatorsLoaded",function(){a.formUtils.LANG={errorTitle:"Formuläret kunde inte skickas!",requiredField:"Detta är ett obligtoriskt fält",requiredFields:"Du har inte besvarat alla frågor",badTime:"Du har inte angett en korrekt tidpunkt",badEmail:"Du har inte angett en korrekt e-postadress",badTelephone:"Du har inte angett ett korrekt telefonnummer",badSecurityAnswer:"Du har angett fel...

* Data conversion
* Data validation
* Automatic documentation

## Special types and validation { #special-types-and-validation }

Apart from normal singular types like `str`, `int`, `float`, etc. you can use more complex singular types that inherit from `str`.

# Python Veri Tiplerine Giriş

Python isteğe bağlı olarak "tip belirteçlerini" destekler.

 **"Tip belirteçleri"** bir değişkenin <abbr title="örneğin: str, int, float, bool">tipinin</abbr> belirtilmesine olanak sağlayan özel bir sözdizimidir.

Değişkenlerin tiplerini belirterek editör ve araçlardan daha fazla destek alabilirsiniz.

* Преобразование данных
* Валидацию данных
* Автоматическую документацию

## Особые типы и валидация

Помимо обычных простых типов, таких как `str`, `int`, `float`, и т.д. Вы можете использовать более сложные базовые типы, которые наследуются от типа `str`.

<%@page pageEncoding="UTF-8" contentType="text/html; charset=UTF-8"%>
<ol class="breadcrumb float-sm-right">
	<c:if test="${crudMode == null}">
		<li class="breadcrumb-item active"><la:message key="labels.crud_link_list" /></li>
	</c:if>
	<c:if test="${crudMode != null}">
		<li class="breadcrumb-item"><la:link href="../list">
				<la:message key="labels.crud_link_list" />
			</la:link></li>
	</c:if>
	<c:if test="${crudMode == 1}">

    //                                                                         ===========
    protected final ColumnInfo _columnBoost = cci("boost", "boost", null, null, Float.class, "boost", null, false, false, false, "Float", 0,
            0, null, null, false, null, null, null, null, null, false);