[Python知识库]利用python一键修改host 一键上网

界面比较简单：

代码如下：

import requests
import re
import os
from PySide2.QtWidgets import QApplication
from PySide2.QtUiTools import QUiLoader
from PySide2.QtCore import QFile


class Stats:   
    def __init__(self):  
        #从文件中加载UI界面
        qfle_stats=QFile('github.ui')     
        qfle_stats.open(QFile.ReadOnly)   
        qfle_stats.close()                

        self.ui=QUiLoader().load(qfle_stats)   
        self.ui.pushButton.clicked.connect(self.run)  

    def run(self):
        self.fangwen1()
        self.fangwen2()
        self.fangwen3()
        self.fangwen4()

    def fangwen1(self):  #取ip1
        headers = {
            'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.108 Safari/537.36'}
        url = requests.get('https://github.com.ipaddress.com/',headers=headers).text
        aa = re.findall("https://www.ipaddress.com/ipv4/" + '(.*?)' + r'\\', url)[0]    

        global a
        a=aa+' '
        self.ui.lineEdit.setText(aa) 
    def fangwen2(self): #取ip2
        headers = {
            'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.108 Safari/537.36'}
        url = requests.get('https://fastly.net.ipaddress.com/github.global.ssl.fastly.net',headers=headers).text
        aa = re.findall("https://www.ipaddress.com/ipv4/" + '(.*?)' + r'\\', url)[0]    
        print(aa)
        global b
        b=aa+' '

        self.ui.lineEdit_2.setText(aa) 
    def fangwen3(self): #取ip3
        headers = {
            'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.108 Safari/537.36'}
        url = requests.get('https://github.com.ipaddress.com/assets-cdn.github.com',headers=headers).text
        aa = re.findall("https://www.ipaddress.com/ipv4/" + '(.*?)' + r'\\', url)   
        global c, d, e, f
        c=aa[0]+' '
        d=aa[1]+' '
        e=aa[2]+' '
        f=aa[3]+' '
        self.ui.lineEdit_3.setText(aa[0])  # 设置内容
        self.ui.lineEdit_4.setText(aa[1])  # 设置内容
        self.ui.lineEdit_5.setText(aa[2])  # 设置内容
        self.ui.lineEdit_6.setText(aa[3])  # 设置内容
    def fangwen4(self):
        with open('C:\Windows\System32\drivers\etc\hosts','r') as zz:
            lines=zz.readlines()

        self.remove()
        global a,b,c,d,e,f


        for line in lines:

            biao=[a,b,c,d,e,f]   #新的ip地址
            global x
            try:
                abc=re.findall('gith'+'(.*?)'+'\.',line)[0]  #判断hosts文件中是否有存在历史ip记录
                line_new=re.sub(r'((2(5[0-5]|[0-4]\d))|[0-1]?\d{1,2})(\.((2(5[0-5]|[0-4]\d))|[0-1]?\d{1,2})){3}', biao[x], line)  #查找出所在行将ip地址更新

                print(line_new)
                self.write(line_new)

                x+=1
            except IndexError:
                print('捕获异常')
        self.cmd()

    def remove(self):  #删除指定文件
        os.remove(r'C:\Windows\System32\drivers\etc\hosts')

    def write(self,text):
        with open('C:\Windows\System32\drivers\etc' + '/' + 'hosts', 'a+') as zz:
            zz.write(text)
            print('写入成功')

    def cmd(self):
        dama='ipconfig /flushdns'
        d=os.system(dama)
        print(d)
        self.ui.label_4.setText('hosts更新成功') 



if __name__ == '__main__':
    x=0
    a=''
    b=''
    c=''
    d=''
    e=''
    f=''
    app = QApplication([])
    Stats = Stats()
    Stats.ui.show()
    app.exec_()

注：使用时退出安全卫生，不然可能hosts更新不成功、有空再优化一下代码。