Python爬图片（面向对象版）

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import requests from lxml import etree from threading import Thread     class Spider(object):       def __init__(self):         self.header = {"user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/112.0.0.0 Safari/537.36"}       def catch(self, page_num):         self.url = f"https://www.169tp.com/xingganmeinv/list_1_{page_num}.html"         res = requests.get(self.url,headers=self.header)         res.encoding = "gbk"         text = res.text           tree = etree.HTML(text)         lis = tree.xpath("/html/body/div[4]/ul/li")           for i in lis:             addr = i.xpath("./a/img/@src")[0]             title = i.xpath("./a/p/text()")               detail = requests.get(addr, headers=self.header).content               with open(f"imgs/{title}.jpg", mode="wb") as f:                 f.write(detail)             print(f" ------------------- {title}.jpg 完成 -----------------------")       def start(self):         for num in range(1,500):             self.catch(num)             print(f"-------------------------- 第 {num} 页完成-----------------------------------")       if __name__ == '__main__':       spider = Spider()     spider.start()