gaierror: [Errno 8] 节点名或服务名已提供，或未知

Question

I want to resolve the ip address of hostnames from a text file. Below code works fine for ipv4 address:

hostname1.txt:
google.com
yahoo.com
facebook.com
cnn.com

with open('hostname1.txt','r') as hostnames:
    for website in hostnames:
        ip = socket.gethostbyname(website.strip())
        
        print ('{0} ip address is: {1}'.format(website,ip))

For ipv6, I used the below code and it works fine when there is only one hostname in the text file. if there are multiple hostnames in the text file, I get this error "gaierror: [Errno 8] nodename nor servname provided, or not known"

import socket

with open('hostname1.txt') as f:
    hostname = f.readlines()
    
    for website in hostname:
        ais = socket.getaddrinfo(website,0,0,0,0)
        
        for result in ais:
            ip = result[-1][0]
            print ('{0} ip address is {1}'.format(website,ip))

gaierror: [Errno 8] nodename nor servname provided, or not known

Answer 1

readlines keeps newline char, so your hostname list is ['google.com\n', 'yahoo.com\n', 'facebook.com\n', 'cnn.com\n'] You stripped \nl in IPV4 part not in IPV6 part. Use the following:

ais = socket.getaddrinfo(website.rstrip(),0,0,0,0)

and you will get correct result.