Threading and Socket help in python

Question

The threading never finishes its full loop and stops after each thread. I default at 10 threads and it stops after 10 attempts. Can someone help fix this issue?
#Put domains into a list
def listdomains(thread):
global list_of_lists
a_file = open("tools/temp", "r")
list_of_lists = [(line.strip()).split() for line in a_file]
a_file.close()
threading_pool(int(thread))
#Check if DNS server
def dns_test(domain):
try:
ip = socket.gethostbyname(domain[0])
print(ip)
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
result = sock.connect_ex((ip,53))
if result == 0:
print("test")
else:
print("not open")
except:
print("errored")
pass
sock.close()
#Threading
def threading_pool(thread):
try:
pool = Pool(thread)
for domain in list_of_lists:
pool.apply_async(dns_test, (domain,))
pool.close()
pool.join()
except KeyboardInterrupt:
print("\n Interrupt")
exit()

Answer 1

I figured it out. I just had to set a timeout value.