爬取全部的校園新聞

0.從新聞url獲取點選次數，並整理成函式

1.從新聞url獲取新聞詳情： 字典,anews

3.生成所頁列表頁的url並獲取全部新聞 ：列表extend(列表) allnews

import requests

from  bs4 import  beautifulsoup
from datetime import datetime
import locale
import re
locale.setlocale(locale.lc_ctype,'chinese')
def getclickcount(newsurl):
newsid = re.findall('\_(.*).html', newsurl)[0].split('/')[1]   #使用正規表示式取得新聞編號
clickurl = ''.format(newsid)
clickstr = requests.get(clickurl).text
return(re.search("hits'\).html\('(.*)'\);",clickstr).group(1))
def getnewscontent(content):
f = open('gzccnews.txt','a',encoding='utf8')
f.write(content)
f.close()
def getnewdetail(newsurl):
resd = requests.get(newsurl)  # 返回response
resd.encoding = 'utf-8'
soupd = beautifulsoup(resd.text, 'html.parser')
newsurl = newsurl
info = soupd.select('.show-info')[0].text
dtime = datetime.strptime(time, '%y-%m-%d %h:%m:%s')
else:
author = '無'
else:
check = '無'
else:
sourec = '無'
if info.find('攝影：') > 0:
photo = info[info.find('攝影：'):].split()[0].lstrip('攝影：')
else:
photo = '無'
clickcount = getclickcount(newsurl)
print('點選次數：' + clickcount)
content = soupd.select('.show-content')[0].text
getnewscontent(content)
# print(content)
def getliurl(listpageurl):
res = requests.get(listpageurl)
res.encoding = 'utf-8'
soup = beautifulsoup(res.text,'html.parser')
# print(soup.select('li'))
for news in soup.select('li'):
if len(news.select('.news-list-title'))>0:
a = news.a.attrs['href']
getnewdetail(a)
firsturl = ''
print('第1頁：')
getliurl(firsturl)
res = requests.get(firsturl)
res.encoding = 'utf-8'
soupn = beautifulsoup(res.text,'html.parser')
n =  int(soupn.select('.a1')[0].text.rstrip('條'))//10+1
# for i in range(2,n):
#     pageurl = '{}.html'.format(i)
#     print('第{}頁：'.format(i))
#     getliurl(pageurl)
#     break

4.設定合理的爬取間隔

import time

import random

time.sleep(random.random()*3)

#設定合理的爬取間隔

for i in range(5):
time.sleep(random.random()*3)

儲存到csv或excel檔案 

newsdf.to_csv(r'f:\duym\爬蟲\gzccnews.csv')

#儲存檔案

pd.series(allnews)
newsdf=pd.dataframe(allnews)
newsdf.to_csv(r'f:\news.csv')

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