Python爬虫-第四章-1-多线程多进程并发爬取Ⅱ

线程池使用案例：

• 一次性开辟一些线程，用户直接给线程池提交任务，线程任务的调度交给线程池

# 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----------------------