//// tab | Linux, macOS, Windows Bash

<div class="termy">

```console
// You could create an env var MY_NAME with
$ export MY_NAME="Wade Wilson"

// Then you could use it with other programs, like
$ echo "Hello $MY_NAME"

Hello Wade Wilson
```

</div>

////

//// tab | Windows PowerShell

<div class="termy">

```console

So, in our example, we can make `tags` be specifically a "list of strings":

{* ../../docs_src/body_nested_models/tutorial002_py310.py hl[12] *}

## Set types { #set-types }

But then we think about it, and realize that tags shouldn't repeat, they would probably be unique strings.

And Python has a special data type for sets of unique items, the `set`.

Then we can declare `tags` as a set of strings:

from fastapi import FastAPI, status
from pydantic import BaseModel

app = FastAPI()


class Item(BaseModel):
    name: str
    description: str | None = None
    price: float
    tax: float | None = None
    tags: set[str] = set()


@app.post("/items/", response_model=Item, status_code=status.HTTP_201_CREATED)
async def create_item(item: Item):

Committer -5 The Apache Software License, Version 2.0 http://www.apache.org/licenses/LICENSE-2.0.txt repo scm:svn:http://svn.apache.org/repos/asf/maven/components/tags/maven-2.0/maven-plugin-api scm:svn:https://svn.apache.org/repos/asf/maven/components/tags/maven-2.0/maven-plugin-api http://svn.apache.org/viewcvs.cgi/maven/components/tags/maven-2.0/maven-plugin-api Apache Software Foundation http://www.apache.org/ c:\home\Brett\cvs\maven-2\maven-components-release\maven-plugin-api\src\main\java src/main/scripts...

379577636719,1,1.20,7,0,0.5,0,0,,,7.5,2,1,166,42,green,0.00,0.0,0.0,54,40,8.05,1312,209.01,1,Manhattan,020901,1020901,E,MN09,Morningside Heights,3802,1647,224,1,Manhattan,022400,1022400,E,MN03,Central Harlem North-Polo Grounds,3803^Y nyc-taxi-data-tabs-100k.csv trip_id vendor_id pickup_datetime dropoff_datetime store_and_fwd_flag rate_code_id pickup_longitude pickup_latitude dropoff_longitude dropoff_latitude passenger_count trip_distance fare_amount extra mta_tax tip_amount tolls_amount ehail_fee...

            // Verify that the XML formatting is correct - no malformed closing tags
            assertFalse(result.contains("</plugin></plugins>"), "Should not have malformed closing tags");
            assertFalse(result.contains("</plugins></pluginManagement>"), "Should not have malformed closing tags");

            // Check that proper indentation is maintained

## Dokümantasyon Etiketleri - OpenAPI

*Yol operasyonlarınıza* etiketler ekleyerek dokümantasyon arayüzünde gruplar halinde görünmesini sağlamak için, [Tutorial - Path Operation Configurations - Tags](../tutorial/path-operation-configuration.md#tags){.internal-link target=_blank} sayfasını okuyun.

## Dokümantasyon Özeti ve Açıklaması - OpenAPI

## FastAPI-Anwendung mit Tags { #fastapi-app-with-tags }

In vielen Fällen wird Ihre FastAPI-App größer sein und Sie werden wahrscheinlich Tags verwenden, um verschiedene Gruppen von *Pfadoperationen* zu separieren.

Zum Beispiel könnten Sie einen Abschnitt für **Items (Artikel)** und einen weiteren Abschnitt für **Users (Benutzer)** haben, und diese könnten durch Tags getrennt sein:

<img src="/img/tutorial/generate-clients/image05.png">

## Aplicação FastAPI com Tags { #fastapi-app-with-tags }

Em muitos casos, sua aplicação FastAPI será maior, e você provavelmente usará tags para separar diferentes grupos de *operações de rota*.

Por exemplo, você poderia ter uma seção para **items** e outra seção para **users**, e elas poderiam ser separadas por tags:

{* ../../docs_src/generate_clients/tutorial002_py39.py hl[21,26,34] *}

from pydantic import BaseModel

app = FastAPI()


class Item(BaseModel):
    name: str
    description: Union[str, None] = None
    price: float
    tax: Union[float, None] = None
    tags: set[str] = set()


@app.post("/items/", response_model=Item, status_code=status.HTTP_201_CREATED)
async def create_item(item: Item):