在返回值之前等待for循环执行

def process_data(data):
    result = []
    for item in data:
        # 处理每个元素
        result.append(process_item(item))
    return result

import asyncio

async def process_item(item):
    # 异步处理每个元素
    return processed_item

async def process_data(data):
    tasks = []
    for item in data:
        tasks.append(process_item(item))
    results = await asyncio.gather(*tasks)
    return results

import threading

def process_item(item):
    # 处理每个元素
    return processed_item

def process_data(data):
    result = []
    lock = threading.Lock()
    def process_item_thread(item):
        processed_item = process_item(item)
        with lock:
            result.append(processed_item)

    threads = []
    for item in data:
        thread = threading.Thread(target=process_item_thread, args=(item,))
        threads.append(thread)
        thread.start()

    for thread in threads:
        thread.join()

    return result