Python--多线程处理
python中有好几种多线程处理方式,更喜欢使用isAlive()来判断线程是否存活,笔记一下,供以后查找
# coding: utf-8 import sys, time import threading def split_list_item_to_group(item_list, group_count): """ 将传入的List中的元素拆分到多个List中,再将这些List作为一个List返回 :param item_list: :param group_count: :return: """ item_group_list = list() for n in range(0, group_count): item_group_list.append(list()) for num in range(0, len(item_list)): mod_num = num % group_count item_group_list[mod_num].append(item_list[num]) return item_group_list def print_number_with_thread(thread_paras): number_group = thread_paras["number_group"] for number in number_group: print("number is {0}".format(number)) time.sleep(0.1) def demo(): number_list = list() thread_count = 10 thread_list = list() for number in range(0, 100000): number_list.append(number) number_group_list = split_list_item_to_group(number_list, thread_count) for number_group in number_group_list: thread_paras = { "number_group": number_group, } thread_item = threading.Thread(target=print_number_with_thread, args=(thread_paras,)) thread_list.append(thread_item) thread_item.start() running_thread_count = thread_count while running_thread_count > 0: running_thread_count = len(filter(lambda item: item.isAlive(), thread_list)) print("正在运行的线程数:{0}".format(running_thread_count)) time.sleep(1) print("多线程执行完成") demo()
在使用threading.Thread创建线程时,对传入的第一个参数有类型要求,为图方便,可以直接要传入的参数封装到一个dict中作为线程参数,然后在线程方法内部转换下。
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