[Tutor] Python Daemons
Daniel Bosah
dbosah at buffalo.edu
Tue Aug 1 14:48:19 EDT 2017
I'm following an online tutorial about threading. This is the code I've
used so far:
import socket
import threading
from queue import Queue
print_lock = threading.Lock()
target = 'pythonprogramming.net'
def portscan(port):
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
try:
con = s.connect((target,port)) # con for connect
with print_lock: # if sucessful run with statement
print 'port', port, 'is open'
con.close() # closes connection
except:
pass #if it doesn't work pass the method
def threader():
while True:
worker = q.get()
portscan(worker)
q.task_done
q = Queue()
for x in range(30):
t = threading.Thread(target = threader() #creates a thread, gets
workers from q, set them to work on portscanning
t.daemon() = True # want it to be a daemon
t.start()
#jobs = ports
for worker in range(1,101): # port zero invalid port
q.put(worker) # puts worker to work
q.join() #waits till thread terminiates
I don't know what a Daemon is, and I also don't know how to use it in
Python 2.7. Apparently its built in Python 3, but I don't know how to use
it in Python 2.7. Any help would be appreciated.
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