Python dns 解析器在同一行中打印域的所有结果

Question

我是Python新手。我正在尝试在程序中使用 dns.resolver 模块，在其中传递域列表并使用线程池运行它们，该线程池异步读取文件的内容，然后从文件中打印每个域的结果。

下面是代码:

import dns.resolver
from multiprocessing.pool import ThreadPool as Pool
pool_size =4
pool = Pool(pool_size)
dnsResolver = dns.resolver.Resolver()
dnsResolver.timeout = 1
dnsResolver.lifetime = 1
dnsResolver.nameservers = ['172.31.0.2']

#domain_list = ['google.com','facebook.com', 'amazon.com']
#for domain in domain_list:
# Query results for the dig operations from a file that contains less than 1024 domains in it 

def fetch_dig_no_blast_results(no_blast_domains):
 try:
  no_blast_domains = no_blast_domains.strip()
  dnsAnswer = dnsResolver.query(no_blast_domains)
  for rdata in dnsAnswer:
   print (no_blast_domains, "resolved to",str(rdata))
 except dns.resolver.NXDOMAIN:
  print ("No records exists for", no_blast_domains)
 except dns.resolver.Timeout:
  print ("Timeout in querying",no_blast_domains)

with open("no-blast-domains.txt",'r') as fd1:
 for no_blast_domains in fd1:
  pool.apply_async(fetch_dig_no_blast_results, (no_blast_domains,))

pool.close()
pool.join()

我有两个问题。

1. 我需要在同一行中打印特定域的 dns 查询的所有结果。例如，域名“amazon.com”的 DNS 查询给出三个 IP。我需要在同一行中打印这三个 ip -

我正在查看的输出示例如下:

['amazon.com' resolved to 'ip1', 'ip2', 'ip3']

当前代码将它们打印为三行

['amazon.com' resolved to 'ip1']

['amazon.com' resolved to 'ip2']

['amazon.com' resolved to 'ip3']

我想确保每个线程查询不同的域，并且没有线程查询相同的域。

任何建议都会对我有很大帮助。

Answer 1

在示例中替换这两行代码:

for rdata in dnsAnswer:
   print (no_blast_domains, "resolved to",str(rdata))

与(如果列表中有整数/数字):

print(no_blast_domains, "resolved to", ",".join(str(x) for x in rdata))

with(如果有，则列表中只有字符串):

print(no_blast_domains, "resolved to", ",".join(rdata))