爬取校园新闻首页的新闻

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+'
'+a+'
'+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)