1.取出一个新闻列表页的全部新闻 包装成函数。
2.获取总的新闻篇数，算出新闻总页数。
3.获取全部新闻列表页的全部新闻详情。
import requests from bs4 import BeautifulSoup from datetime import datetime import re # 获取新闻点击次数 def getNewsId(url): newsId = re.findall(r'\_(.*).html', url)[0][-4:] clickUrl = 'http://oa.gzcc.cn/api.php?op=count&id={}&modelid=80'.format(newsId) clickRes = requests.get(clickUrl) # 利用正则表达式获取新闻点击次数 clickCount = int(re.search("hits').html('(.*)');", clickRes.text).group(1)) return clickCount # 获取新闻细节 def getNewsDetail(newsUrl): resd = requests.get(newsUrl) resd.encoding = 'utf-8' soupd = BeautifulSoup(resd.text, 'html.parser') content = soupd.select('#content')[0].text info = soupd.select('.show-info')[0].text # 调用getNewsId()获取点击次数 count = getNewsId(newsUrl) # 识别时间格式 date = re.search('(d{4}.d{2}.d{2}sd{2}.d{2}.d{2})', info).group(1) # 识别一个至三个数据 if(info.find('作者：')>0): author = re.search('作者：((.{2,4}s|.{2,4}、){1,3})', info).group(1) if(info.find('审核：')>0): check = re.search('审核：((.{2,4}s){1,3})', info).group(1) if(info.find('来源：')>0): sources = re.search('来源：(.*)s*摄|点', info).group(1) # 用datetime将时间字符串转换为datetime类型 dateTime = datetime.strptime(date, '%Y-%m-%d %H:%M:%S') # 利用format对字符串进行操作 print('发布时间：{0} 作者：{1} 审核：{2} 来源：{3} 点击次数：{4}'.format(dateTime, author, check, sources, count)) print(content) def getListPage(listUrl): res = requests.get(listUrl) res.encoding = 'utf-8' soup = BeautifulSoup(res.text, 'html.parser') for new in soup.select('li'): if len(new.select('.news-list-title')) > 0: title = new.select('.news-list-title')[0].text description = new.select('.news-list-description')[0].text newsUrl = new.select('a')[0]['href'] print('标题:{0} 内容:{1} 链接:{2}'.format(title, description, newsUrl)) # 调用getNewsDetail()获取新闻详情 getNewsDetail(newsUrl) break listUrl = 'http://news.gzcc.cn/html/xiaoyuanxinwen/' getListPage(listUrl) res = requests.get(listUrl) res.encoding = 'utf-8' soup = BeautifulSoup(res.text, 'html.parser') listCount = int(soup.select('.a1')[0].text.rstrip('条'))//10+1 for i in range(2,listCount): listUrl= 'http://news.gzcc.cn/html/xiaoyuanxinwen/{}.html'.format(i) getListPage(listUrl)
4.找一个自己感兴趣的主题，进行数据爬取，并进行分词分析。不能与其它同学雷同。
import requests, re, jieba
from bs4 import BeautifulSoup
from datetime import datetime
# 获取新闻细节
def getNewsDetail(newsUrl):
resd = requests.get(newsUrl)
resd.encoding = 'gb2312'
soupd = BeautifulSoup(resd.text, 'html.parser')
content = soupd.select('#endText')[0].text
info = soupd.select('.post_time_source')[0].text
date = re.search('(d{4}.d{2}.d{2}sd{2}.d{2}.d{2})', info).group(1) # 识别时间格式
dateTime = datetime.strptime(date, '%Y-%m-%d %H:%M:%S') # 用datetime将时间字符串转换为datetime类型
sources = re.search('来源:s*(.*)', info).group(1)
keyWords = getKeyWords(content)
print('发布时间：{0}
来源：{1}'.format(dateTime, sources))
print('关键词：{}、{}、{}'.format(keyWords[0], keyWords[1], keyWords[2]))
print(content)
# 通过jieba分词，获取新闻关键词
def getKeyWords(content):
content = ''.join(re.findall('[u4e00-u9fa5]', content)) # 通过正则表达式选取中文字符数组，拼接为无标点字符内容
wordSet = set(jieba._lcut(content))
wordDict = {}
for i in wordSet:
wordDict[i] = content.count(i)
deleteList, keyWords = [], []
for i in wordDict.keys():
if len(i) < 2:
deleteList.append(i) # 去掉单字无意义字符
for i in deleteList:
del wordDict[i]
dictList = list(wordDict.items())
dictList.sort(key=lambda item: item[1], reverse=True) # 排序，返回前三关键字
for i in range(3):
keyWords.append(dictList[i][0])
return keyWords
# 获取一页的新闻
def getListPage(listUrl):
res = requests.get(listUrl)
res.encoding = 'gbk'
soup = BeautifulSoup(res.text, 'html.parser')
for new in soup.select('.newsList')[0].select('li'):
newsUrl = new.select('a')[0]['href']
title = new.select('a')[0].text
print('题目：{0}
网址链接：{1}'.format(title, newsUrl))
getNewsDetail(newsUrl)
break
listUrl = 'http://tech.163.com/internet/'
getListPage(listUrl)
for i in range(2, 20):
listUrl = 'http://tech.163.com/special/tele_2016_%02d/' % i
getListPage(listUrl)
