大家好，我是早起。
在 Python 中，多线程最常见的一个场景就是爬虫，例如这样一个需求，有多个结构一样的页面需要爬取，例如下方的URL（豆瓣阿凡达影评，以10个为例）
url_list = [
'https://movie.douban.com/subject/1652587/reviews?sort=time&start=0',
'https://movie.douban.com/subject/1652587/reviews?sort=time&start=20',
'https://movie.douban.com/subject/1652587/reviews?sort=time&start=40',
'https://movie.douban.com/subject/1652587/reviews?sort=time&start=60',
'https://movie.douban.com/subject/1652587/reviews?sort=time&start=80',
'https://movie.douban.com/subject/1652587/reviews?sort=time&start=100',
'https://movie.douban.com/subject/1652587/reviews?sort=time&start=120',
'https://movie.douban.com/subject/1652587/reviews?sort=time&start=140',
'https://mo