from typing import Union


def process_item(item: Union[int, str]):

def process_item(item: int | str):

def process_items(items_t: tuple[int, int, str], items_s: set[bytes]):

from typing import Dict


def process_items(prices: Dict[str, float]):
    for item_name, item_price in prices.items():
        print(item_name)

def process_items(items: list[str]):
    for item in items:

@app.middleware("http")
async def add_process_time_header(request: Request, call_next):
    start_time = time.perf_counter()
    response = await call_next(request)
    process_time = time.perf_counter() - start_time
    response.headers["X-Process-Time"] = str(process_time)

from typing import List


def process_items(items: List[str]):
    for item in items:

def process_items(prices: dict[str, float]):
    for item_name, item_price in prices.items():
        print(item_name)

from typing import Set, Tuple


def process_items(items_t: Tuple[int, int, str], items_s: Set[bytes]):