python练习
1:邮箱验证
import re
email = input("请输入你的邮箱：")
if re.match(r'^[0-9a-zA-Z_]{0,19}@[0-9a-zA-Z]{1,13}\.[com,cn,net]{1,3}$',email):
print('你输入的邮箱正确')
else:
print('你输入的邮箱不正确，请重新输入')
2：用正则表达式识别出所有电话号码
tellstr='''版权所有：广州商学院 地址：广州市黄埔区九龙大道206号
学校办公室：020-82876130 招生电话：020-82872773
粤公网安备 44011602000060号 粤ICP备15103669号'''
tell=re.findall('(\d{3,4})-(\d{6,8})',tellstr)
print(tell)
3. 用正则表达式进行英文分词。re.split('',news)
str='''Yasuo Fukuda, chairman of the Boao Forum_for Asia, delivers a welcome speech at the BFA 2018 opening ceremony on April 10, 2018.[Photo by Zou Hong/China Daily]'''
print(re.split('[\s?,_-]+',str))
4. 使用正则表达式取得新闻编号
newUrl='http://news.gzcc.cn/html/2018/xiaoyuanxinwen_0404/9183.html'
newNum = re.match('http://news.gzcc.cn/html/2018/xiaoyuanxinwen_(.*).html', newUrl).group(1).split("/")[-1]
print(newNum)
5: 生成点击次数的Request URL
requesId = re.findall('\_(.*).html', newUrl)[0].split('/')[-1]
requesURL = "http://oa.gzcc.cn/api.php?op=count&id={}&modelid=80".format(requesId)
print(requesURL)
6. 获取点击次数
newClickCount = re.findall('\_(.*).html', newUrl)[0].split('/')[-1]
res = requests.get('http://oa.gzcc.cn/api.php?op=count&id={}&modelid=80'.format(newClickCount))
print(res.text.split(".html")[-1].lstrip("('").rsplit("')")[0])
7. 将456步骤定义成一个函数 def getClickCount(newsUrl):
def getClickCount(newUrl):
# 新闻编号
newNum = re.match('http://news.gzcc.cn/html/2018/xiaoyuanxinwen_(.*).html', newUrl).group(1).split("/")[-1]
print(newNum)
# 新闻点击次数的url
requesId = re.findall('\_(.*).html', newUrl)[0].split('/')[-1]
requesURL = "http://oa.gzcc.cn/api.php?op=count&id={}&modelid=80".format(requesId)
print(requesURL)
# 新闻点击次数
newClickCount = re.findall('\_(.*).html', newUrl)[0].split('/')[-1]
res = requests.get('http://oa.gzcc.cn/api.php?op=count&id={}&modelid=80'.format(newClickCount))
print(res.text.split(".html")[-1].lstrip("('").rsplit("')")[0])
getClickCount(newUrl)
8. 将获取新闻详情的代码定义成一个函数 def getNewDetail(newsUrl):
def getNewDetail(newsUrl): # 标题 newTitle = new.select('.news-list-title')[0].text # 时间 time = new.select('span')[0].text # 来源 resource = new.select('span')[1].text resd = requests.get(newsUrl) resd.encoding = 'utf-8' soupd = BeautifulSoup(resd.text, 'html.parser') # 点击次数 clickCount = getClickCount(newsUrl) # print(clickCount) print('标题：' + ti + ' 时间：' + tim + ' 来源：' + source + ' 点击次数：' + clickCount + ' 链接: ' + url) # 正文 print('正文:') content = soupd.select('#content')[0].text.split() for i in content: print(i)mynewsUrl = 'http://news.gzcc.cn/html/xiaoyuanxinwen/'res = requests.get(mynewsUrl)res.encoding = 'utf-8'soup = BeautifulSoup(res.text, 'html.parser')for n in soup.select('.news-list')[0].select('li'): # 链接 a = new.select('a')[0].attrs['href'] getNewDetail(a)9. 取出一个新闻列表页的全部新闻 包装成函数def getListPage(pageUrl):
def getListPage(newsUrl):
res = requests.get(newsUrl) res.encoding = 'utf-8' soup = BeautifulSoup(res.text, 'html.parser') fori in soup.select('li'): if len(soup.select('.news-list-title')) > 0: a = soup.select('a')[0].attrs['href'] getNewDetail(a)res = requests.get(newsUrl)res.encoding = 'utf-8'soup = BeautifulSoup(res.text, 'html.parser')count = int(soup.select('.a1')[0].text.rstrip('条'))for i in range(count, count + 1): pageUrl = 'http://news.gzcc.cn/html/xiaoyuanxinwen/[].html'.format(i) getListPage(pageUrl)10. 获取总的新闻篇数，算出新闻总页数包装成函数def getPageN():
def getPageN(): res = requests.get(newsUrl) res.encoding = 'utf-8' soup = BeautifulSoup(res.text, 'html.parser') count = int(soup.select('.a1')[0].text.rstrip('条')) return (count//10+1)11. 获取全部新闻列表页的全部新闻详情。
pageUrl = 'http://news.gzcc.cn/html/xiaoyuanxinwen/'count = getPageN()for i in range(count,count + 1): pageUrl = 'http://news.gzcc.cn/html/xiaoyuanxinwen/{}.html'.format(i) getListPage(pageUrl)