使用Python将大型嵌套循环划分为8个(或更多)进程的巧妙方法是什么？

import multiprocessing
import subprocess

def process_data(data):
    for item in data:
        # 对每个item进行操作
        pass

if __name__ == '__main__':
    data = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
    num_processes = 8

    with multiprocessing.Manager() as manager:
        processes = manager.dict()

        for i in range(num_processes):
            process_id = i
            processes[process_id] = subprocess.Popen(['python', 'process_data.py', str(i)], stdout=subprocess.PIPE)

        for process in processes.values():
            process.wait()

        print("所有进程已结束")