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
res = requests.get('http://news.gzcc.cn/html/xiaoyuanxinwen/')
res.encoding = 'utf-8'
soup = BeautifulSoup(res.text, 'html.parser')
for news in soup.select('li'):
if len(news.select('.news-list-title')) > 0:
t = news.select('.news-list-title')[0].text # 标题
a = news.select('a')[0].attrs['href'] # 链接
resd = requests.get(a)
resd.encoding = 'utf-8'
soupd = BeautifulSoup(resd.text, 'html.parser') # 打开询问详情页
c = soupd.select('#content')[0].text # 正文
print(t + '\n' + a + '\n' + c)
break
2. 分析字符串，获取每篇新闻的发布时间，作者，来源，摄影等信息。
import requests
from bs4 import BeautifulSoup
res = requests.get('http://news.gzcc.cn/html/xiaoyuanxinwen/')
res.encoding = 'utf-8'
soup = BeautifulSoup(res.text, 'html.parser')
for news in soup.select('li'):
if len(news.select('.news-list-title')) > 0:
t = news.select('.news-list-title')[0].text # 标题
d = news.select('.news-list-description')[0].text
a = news.a.attrs['href']
resd = requests.get(a)
resd.encoding = 'utf-8'
soupd = BeautifulSoup(resd.text,'html.parser')
c = soupd.select('#content')[0].text # 正文
info = soupd.select('.show-info')[0].text
dt = info.lstrip('发布时间:')[:19]
zz = info[info.find('作者'):].split()[0].lstrip('作者：')
ly = info[info.find('来源'):].split()[0].lstrip('来源：')
if (info.find("摄影：") > 0):
sy = info[info.find("摄影："):].split()[0].lstrip('摄影：') # 摄影
print(dt,zz,ly,sy)
else:
print(dt,zz,ly)
3. 将其中的发布时间由str转换成datetime类型。
import requests
from bs4 import BeautifulSoup
res = requests.get('http://news.gzcc.cn/html/xiaoyuanxinwen/')
res.encoding = 'utf-8'
soup = BeautifulSoup(res.text, 'html.parser')
for news in soup.select('li'):
if len(news.select('.news-list-title')) > 0:
a = news.a.attrs['href']
resd = requests.get(a)
resd.encoding = 'utf-8'
soupd = BeautifulSoup(resd.text, 'html.parser')
info = soupd.select('.show-info')[0].text
dt = info.lstrip('发布时间:')[:19]
from datetime import datetime
dt = info.lstrip('发布时间:')[:19]
dati = datetime.strptime(dt, '%Y-%m-%d %H:%M:%S')
print(dati, dati.strftime('%Y/%m/%d'))
4. 将完整的代码及运行结果截图发布在作业上。
import requests
from bs4 import BeautifulSoup
res = requests.get('http://news.gzcc.cn/html/xiaoyuanxinwen/')
res.encoding = 'utf-8'
soup = BeautifulSoup(res.text, 'html.parser')
# print(soup)
for news in soup.select('li'):
if len(news.select('.news-list-title')) > 0:
d = news.select('.news-list-info')[0].contents[0].text # 日期
t = news.select('.news-list-title')[0].text # 标题
a = news.select('a')[0].attrs['href'] # 链接
resd = requests.get(a)
resd.encoding = 'utf-8'
soupd = BeautifulSoup(resd.text, 'html.parser') # 打开询问详情页
print(soupd.select('#content')[0].text)
print(d, t, a)
break
for news in soup.select('li'):
if len(news.select('.news-list-title')) > 0:
t = news.select('.news-list-title')[0].text # 标题
d = news.select('.news-list-description')[0].text
a = news.a.attrs['href']
resd = requests.get(a)
resd.encoding = 'utf-8'
soupd = BeautifulSoup(resd.text, 'html.parser')
# c = soupd.select('#content')[0].text # 正文
info = soupd.select('.show-info')[0].text
# print(info)
# print(a)
# print(d)
# print(c)
# print(t)
# break
# info= '发布时间:2018-04-01 11:57:00 作者：陈流芳 审核：权麟春 来源：马克思主义学院 点击：次'
dt = info.lstrip('发布时间:')[:19]
zz = info[info.find('作者'):].split()[0].lstrip('作者：')
ly = info[info.find('来源'):].split()[0].lstrip('来源：')
from datetime import datetime
dt = info.lstrip('发布时间:')[:19]
dati = datetime.strptime(dt, '%Y-%m-%d %H:%M:%S')
print(dati, dati.strftime('%Y/%m/%d'))
# print(dt,zz,ly)
if (info.find("摄影：") > 0):
sy = info[info.find("摄影："):].split()[0].lstrip('摄影：') # 摄影
print(dt, zz, ly, sy)
else:
print(dt, zz, ly)
