最新操作

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:
#         print(news.select('.news-list-title'))


for newc in soup.select('li'):
    if len(newc.select('.news-list-title'))>0:
        d=newc.select('a')[0].attrs['href']
        res1=requests.get(d)
        res1.encoding="utf-8"
        e=BeautifulSoup(res1.text,'html.parser')
        content=e.select('#content')[0].text
        show=e.select('.show-info')[0].text
        print(content,show)
  

2. 分析字符串，获取每篇新闻的发布时间，作者，来源，摄影。

for news in soup.select('li'):
    if len(news.select('.news-list-title'))>0:
        title = news.select('.news-list-title')[0].get_text()
        time =  news.select('.news-list-info span')[0].get_text()
        href = news.select('a')[0].attrs['href']
        print(time,title,href)


        res1 = requests.get(href)
        res1.encoding = "utf-8"
        soup = BeautifulSoup(res1.text, "html.parser")
        con = soup.select('#content')[0].tedtxt
        info = soup.select('.show-info')[0].get_text()
        dt = info.lstrip('发布时间:')[:19]
        dt2 = datetime.strptime(dt,'%Y-%m-%d %H:%M:%S')
        print(dt2)
         ///此处代码参考117李智濠
        i = info.find('来源：')
        if i>0:
            s =  info[info.find('来源：'):].split()[0].replace('来源：')
            print(s)
        a = info.find('作者：')
        if a > 0:
            l = info[info.find('作者：'):].split()[0].replace('作者：')
            print(l)
        y = info.find('摄影：')
        if y > 0:
            u = info[info.find('作者：'):].split()[0].replace('作者：')
            print(u)

3. 将其中的发布时间由str转换成datetime类型。

from datetime import datetime
        str ='2018-03-30 17:10:12'
        dt1 = datetime.strptime(str,'%Y-%M-%D %H:%M:%S').year
        now = datetime.now()
        type(now)
        now.strftime("%Y-%M-%D %H:%M:%S")