Python 爬虫练习项目——异步加载爬取
项目代码
from bs4 import BeautifulSoup
import requests
url_prefix = 'https://knewone.com/discover?page='
infos = []
# 获取单个页面数据
def getAPage(url,data = None):
web_data = requests.get(url)
soup = BeautifulSoup(web_data.text,'lxml')
# print(soup)
images = soup.select('header > a > img')
titles = soup.select('section > h4 > a')
links = soup.select('a.cover-inner')
likes = soup.select('span.fanciers_count')
if data == None:
for image,title,link,like in zip(images,titles,links,likes):
data = {
'image':image.get('src'),
'title':title.get_text(),
'link':'https://knewone.com' + link.get('href'),
'like':int(like.get_text())
}
print(data)
infos.append(data)
# 获取多个加载的数据
def getMorePages(start,end):
for url_suffix in range(start,end):
getAPage(url_prefix + str(url_suffix))
print('---------------已经获取{}条数据---------------'.format(len(infos)), sep='\n')
# 获取点赞排名前几的数据
def getInfosByLikes(order,infos =infos):
infos = sorted(infos,key= lambda info:info['like'],reverse = True)
for info in infos[:order]:
print(info['like'],info['title'],info['image'],info['link'])
getMorePages(1,4)
getInfosByLikes(5)
项目特点：
【转载】同步加载、异步加载、延迟加载
爬取的网站链接
