python爬虫——正则爬取手机号

1. 安装re模块、requests库、beautifulsoup4库

cmd → pip install re → 回车

cmd → pip install requests → 回车

cmd → pip install beautifulsoup4 → 回车

2.调用安装的库和模块

import requests

import re

from bs4 import BeautifulSoup

3. 调用网址

r = requests.get(“http://www.haomahao.com/”)

4. 编写正则表达式

parttern = “1[35789]d{9}”

5.完整代码

import requests

import re

from bs4 import BeautifulSoup

def down():

    r = requests.get(“http://www.haomahao.com/”) #调用网页

    r.encoding = r.apparent_encoding #更改网页编码，防止出现乱码

    #print(r.text)

    bs = BeautifulSoup(r.text,”html.parser”)

    str1 = bs.getText() #将BeautifulSoup提出出来的写完text

    parttern = “1[35789]d{9}” #编写手机号的正则表达式

    list = re.findall(parttern,str1)

    #print(list) #调试正则是否正确

    f = open(“手机号.txt”,mode=”w”,encoding=”utf-8″) #写入文件

    f.write(”
“.join(list))

    f.close()

if __name__ == “__main__”:

    down()