python - 从python内执行的命令 'host'获取IP

Question

我有这个函数来显示域的第一个 IP:

def get_ip_address(url):
    command="host "+url
    process=os.popen(command)
    results=str(process.read()) 
    marker=results.find('has address')+12   
    print results[marker:].splitlines()[0]
    return results[marker:].splitlines()[0]

但这只显示了我的第一个IP。我只想显示 ip。该标记用于没有“有地址”，如下所示(想象我输入“reddit.com”:

['151.101.65.140', 'reddit.com has address 151.101.129.140', 'reddit.com has address 151.101.193.140', 'reddit.com has address 151.101.1.140', 'reddit.com mail is handled by 1 aspmx.l.google.com.', 'reddit.com mail is handled by 10 aspmx2.googlemail.com.', 'reddit.com mail is handled by 10 aspmx3.googlemail.com.', 'reddit.com mail is handled by 5 alt1.aspmx.l.google.com.', 'reddit.com mail is handled by 5 alt2.aspmx.l.google.com.']

我只想显示 ip，而不是 reddit.com 有地址，也不显示 ip 的末尾、邮件被处理等。

我尝试过

def get_ip_address(url):
    command="host "+url
    process=os.popen(command)
    results=str(process.read()) 
    marker=results.find('has address')+12
    i=0
    arrayIps=[]
    while "has address" in results[marker:].splitlines()[i]:

        print results[marker:].splitlines()[i]
        arrayIps.append(results[marker:].splitlines()[i])
        print("array")
        print arrayIps[i]
        i=i+1
    return arrayIps

但是它不起作用!甚至没有返回任何有用的东西!

我期待的是一个数组(在本例中):

'151.101.65.140', '151.101.129.140', '151.101.193.140', '151.101.1.140'

Answer 1

看到它根据您的需要显示了多个主机。您的输出可以使用 map 函数生成

In [132]: socket.getaddrinfo("reddit.com", 80, proto=socket.IPPROTO_TCP)
Out[132]: 
[(<AddressFamily.AF_INET: 2>,
  <SocketKind.SOCK_STREAM: 1>,
  6,
  '',
  ('151.101.65.140', 80)),
 (<AddressFamily.AF_INET: 2>,
  <SocketKind.SOCK_STREAM: 1>,
  6,
  '',
  ('151.101.1.140', 80)),
 (<AddressFamily.AF_INET: 2>,
  <SocketKind.SOCK_STREAM: 1>,
  6,
  '',
  ('151.101.129.140', 80)),
 (<AddressFamily.AF_INET: 2>,
  <SocketKind.SOCK_STREAM: 1>,
  6,
  '',
  ('151.101.193.140', 80))]


In [134]: list(map(lambda x:x[4][0],socket.getaddrinfo("reddit.com", 80, proto=socket.IPPROTO_TCP)))
Out[134]: ['151.101.129.140', '151.101.193.140', '151.101.65.140', '151.101.1.140']