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线程池使用案例：

# Demo Describe:线程池和进程池from concurrent.futures import ThreadPoolExecutor, ProcessPoolExecutor# start--------1,线程池----------------------def fn(name):    for i in range(1000):        print(name, i)if __name__ == "__main__":    # 线程池里开启50个线程处理任务    with ThreadPoolExecutor(50) as t:        for i in range(100):            t.submit(fn, name=f"线程{i}")    print("处理完毕")  # 线程池任务完毕才会继续执行-线程守护# end--------1,线程池----------------------# start--------2,进程池----------------------# def fn(name):#     for i in range(1000):#         print(name,i)## if __name__ == "__main__":#     # 线程池里开启50个线程处理任务#     with ProcessPoolExecutor(50) as t:#         for i in range(100):#             t.submit(fn,name=f"线程{i}")#     print("处理完毕")   # 线程池任务完毕才会继续执行-线程守护# end--------2,进程池----------------------