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

## FastAPI App with Tags

In many cases your FastAPI app will be bigger, and you will probably use tags to separate different groups of *path operations*.

For example, you could have a section for **items** and another section for **users**, and they could be separated by tags:

=== "Python 3.9+"

    ```Python hl_lines="21  26  34"

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


@app.post(
    "/items/",
    response_model=Item,
    summary="Create an item",
    description="Create an item with all the information, name, description, price, tax and a set of unique tags",
)
async def create_item(item: Item):

  <scm>
    <connection>scm:svn:http://svn.codehaus.org/plexus/plexus-classworlds/tags/plexus-classworlds-1.2-alpha-7</connection>
    <developerConnection>scm:svn:https://svn.codehaus.org/plexus/plexus-classworlds/tags/plexus-classworlds-1.2-alpha-7</developerConnection>
    <url>http://fisheye.codehaus.org/browse/plexus/plexus-classworlds/tags/plexus-classworlds-1.2-alpha-7</url>
  </scm>
  <build>
    <plugins>
      <plugin>

		}

		if len(r.Flags.Filter.Tags) > 0 {
			// Only parse object tags if tags filter is specified.
			tagMap := map[string]string{}
			tagStr := info.Metadata[xhttp.AmzObjectTagging]
			if len(tagStr) != 0 {
				t, err := tags.ParseObjectTags(tagStr)
				if err != nil {
					return false
				}
				tagMap = t.ToMap()
			}

			for _, kv := range r.Flags.Filter.Tags {
				for t, v := range tagMap {

		{ // Filter with And, Prefix & multiple Tag tags
			inputXML: ` <Filter>
							<And>
							<Prefix>key-prefix</Prefix>
							<Tag>
								<Key>key1</Key>
								<Value>value1</Value>
							</Tag>
							<Tag>
								<Key>key2</Key>
								<Value>value2</Value>
							</Tag>
							</And>
						</Filter>`,
			expectedErr: nil,
		},
		{ // Filter with And and multiple Tag tags
			inputXML: ` <Filter>
							<And>

    </plugins>
  </build>
  <scm>
    <connection>scm:svn:http://svn.codehaus.org/plexus/plexus-utils/tags/plexus-utils-1.4.5</connection>
    <developerConnection>scm:svn:https://svn.codehaus.org/plexus/plexus-utils/tags/plexus-utils-1.4.5</developerConnection>
    <url>http://fisheye.codehaus.org/browse/plexus/plexus-utils/tags/plexus-utils-1.4.5</url>
  </scm>
  <reporting>
    <plugins>
      <plugin>

    return f"{route.tags[0]}-{route.name}"


app = FastAPI(generate_unique_id_function=custom_generate_unique_id)


class Item(BaseModel):
    name: str
    price: float


class ResponseMessage(BaseModel):
    message: str


class User(BaseModel):
    username: str
    email: str


@app.post("/items/", response_model=ResponseMessage, tags=["items"])
async def create_item(item: Item):

                        "tax": {
                            "title": "Tax",
                            "anyOf": [{"type": "number"}, {"type": "null"}],
                        },
                        "tags": {
                            "title": "Tags",
                            "uniqueItems": True,
                            "type": "array",
                            "items": {"type": "string"},
                            "default": [],

                        "tax": {
                            "title": "Tax",
                            "anyOf": [{"type": "number"}, {"type": "null"}],
                        },
                        "tags": {
                            "title": "Tags",
                            "uniqueItems": True,
                            "type": "array",
                            "items": {"type": "string"},
                            "default": [],

    price: float
    tax: Union[float, None] = None
    tags: Set[str] = set()


@app.post("/items/", response_model=Item, tags=["items"])
async def create_item(item: Item):
    return item


@app.get("/items/", tags=["items"])
async def read_items():
    return [{"name": "Foo", "price": 42}]


@app.get("/users/", tags=["users"])
async def read_users():