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2024-02-19 17:45:34
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我的视频学习笔记
视频地址:https://www.bilibili.com/video/av17920849?p=6
源代码:https://morvanzhou.github.io/tutorials/data-manipulation/scraping/2-04-practice-baidu-baike/
import re
import random
from urllib.request import urlopen
from bs4 import BeautifulSoup
base_url = "https://baike.baidu.com"
his = ["/item/%E7%BD%91%E7%BB%9C%E7%88%AC%E8%99%AB/5162711"]
for i in range(20):
url = base_url + his[-1]
html = urlopen(url).read().decode('utf-8')
soup = BeautifulSoup(html, features='lxml')
print(i, soup.find('h1').get_text(), ' url: ', his[-1])
# find valid urls
sub_urls = soup.find_all("a", {"target": "_blank", "href": re.compile("/item/(%.{2})+$")})
if len(sub_urls) != 0:
his.append(random.sample(sub_urls, 1)[0]['href'])
else:
# no valid sub link found
his.pop()
getaddinfo是获取地址信息失败。