1. 用requests库和BeautifulSoup库，爬取校园新闻首页新闻的标题、链接、正文。
import requests
from bs4 import BeautifulSoup
url = ‘http://news.gzcc.cn/html/xiaoyuanxinwen/‘
res = requests.get(url)
res.encoding = ‘utf-8‘
soup = BeautifulSoup(res.text, ‘html.parser‘)
for news in soup.select(‘li‘):
if len(news.select(‘.news-list-title‘))>0:
d = news.select(‘.news-list-info‘)[0].contents[0].text #时间
t = news.select(‘.news-list-title‘)[0].text #标题
a = news.select(‘a‘)[0].attrs[‘href‘] #连接
print(d, t, a)
# 通过连接获取新闻网页
res2 = requests.get(a)
res2.encoding = ‘utf-8‘
soup2 = BeautifulSoup(res2.text, ‘html.parser‘)
# 取得新闻正文
z=soup2.select(‘#content‘)[0].text
print(z)
break
运行结果如图所示：
2. 分析字符串，获取每篇新闻的发布时间，作者，来源等信息。
#取得发布时间、作者等数据项
info=soup2.select(‘.show-info‘)[0].text
# print(info)
dt = info.lstrip(‘发布时间:‘)[:19]
at = info[info.find(‘作者：‘):].split()[0].lstrip(‘作者：‘)
sh = info[info.find(‘审核：‘):].split()[0].lstrip(‘审核：‘)
ly = info[info.find(‘来源：‘):].split()[0].lstrip(‘来源：‘)
print(dt, at, sh, ly)
运行结果如下：
3. 将其中的发布时间由str转换成datetime类型。
from datetime import datetime
dati = datetime.strptime(dt, ‘%Y-%m-%d %H:%M:%S‘)
print(dati, dati.strftime(‘%Y/%m/%d‘))
运行结果如图所示：
4. 将完整的代码及运行结果截图发布在作业上
# -*- coding: UTF-8 -*-
# -*- author: wang -*-
import requests
from bs4 import BeautifulSoup
url = ‘http://news.gzcc.cn/html/xiaoyuanxinwen/‘
res = requests.get(url)
res.encoding = ‘utf-8‘
soup = BeautifulSoup(res.text, ‘html.parser‘)
for news in soup.select(‘li‘):
if len(news.select(‘.news-list-title‘))>0: #时间
d = news.select(‘.news-list-info‘)[0].contents[0].text
t = news.select(‘.news-list-title‘)[0].text #标题
a = news.select(‘a‘)[0].attrs[‘href‘] #连接
print(d, t, a)
# 通过连接获取新闻网页
res2 = requests.get(a)
res2.encoding = ‘utf-8‘
soup2 = BeautifulSoup(res2.text, ‘html.parser‘)
# 取得新闻正文
z=soup2.select(‘#content‘)[0].text
print(z)
#取得发布时间、作者等数据项
info=soup2.select(‘.show-info‘)[0].text
print(info)
dt = info.lstrip(‘发布时间:‘)[:19]
at = info[info.find(‘作者：‘):info.find(‘审核：‘)].split()[0].lstrip(‘作者：‘)
sh = info[info.find(‘审核：‘):].split()[0].lstrip(‘审核：‘)
ly = info[info.find(‘来源：‘):].split()[0].lstrip(‘来源：‘)
print(dt,at,sh,ly)
from datetime import datetime
dati = datetime.strptime(dt, ‘%Y-%m-%d %H:%M:%S‘)
# print(type(dati))
print(dati, dati.strftime(‘%Y/%m/%d‘))
break
运行代码如图所示：
