URL for 单线程 和 多线程（线程池）

# 原 URL ，只能爬取一页的数据
url = "http://www.xinfadi.com.cn/marketanalysis/0/list/1.shtml"

# 单线程，爬取全部数据
for i in range(1, 100):
    url = f"http://www.xinfadi.com.cn/marketanalysis/0/list/{i}.shtml"

# 多线程，线程池
from concurrent.futures import ThreadPoolExecutor   

def download(url):
    pass

if __name__ == '__main__':
    with ThreadPoolExecutor(20) as t:
        for i in range(1, 100):
            url = f"http://www.xinfadi.com.cn/marketanalysis/0/list/{i}.shtml"
            t.submit(download, url)