IP及端口号的获取及保存【实用】

import urllib.requestimport reimport osdef url_open(url):    res=urllib.request.Request(url)    res.add_header('User-Agent','Mozilla/5.0 (Windows NT 6.1; rv:51.0) Gecko/20100101 Firefox/51.0')    req=urllib.request.urlopen(res)    html=req.read()    return  htmldef ip(url,file,count,user_input):    try:        html=url_open(url).decode('utf-8')    except UnicodeDecodeError:        html=url_open(url)    s=r'(\d+\.\d+\.\d+\.\d+)'    d=r'"PORT">(\d*)</td>'    ips=re.findall(s,html)           #获取IP    dk=re.findall(d,html)            #获取端口号    dictionary = dict(zip(ips, dk))  #将IP 和端口号压缩成字典    ips = list(dictionary)           #获取IP字典的Key值    for ip in ips:                  #通过遍历Key，取出对应的Value        with open(file, 'a+') as f:            f.write(ip+'  ')        #保存IP            f.write(dictionary[ip]+'\n')#保存端口号            print('第%s条'%count)            count+=1        if count==user_input+1: #用户所需条数控制器            print('获取完成，请到%s文件夹下查看!'%file)            break    return countif __name__ =='__main__':    user_input=int(input('要下载多少条：'))    file='D:\My Documents\Desktop\\ips.txt'    if os.path.exists(file):        pass    i=1   #页面循环控制器    count = 1 #IP计数器    while i:        try:            url = 'http://www.kuaidaili.com/free/inha/%s/'%i            count = ip(url,file,count,user_input)            if count == user_input+1:                break            i+=1        except TypeError: #无法解码C++转义字符，跳过当前页            i+=1            continue        except urllib.error.HTTPError: #获取网页地址不稳定，时常503            continue