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Mon Sep 19 03:43:07 EDT 2005 · http://mail.python.org/pipermail/python-list/2005-September/338685.html

ed wrote:
> this script should create individual threads to scan a range of IP
> addresses, but it doesnt, it simple ... does nothing. it doesnt hang
> over anything, the thread is not being executed, any ideas anyone?

It's because of the bugs. Nothing happens because

     threading < MAX_THREADS

is always false. You are comparing a module to an int. Next,
you never create any instances of scanThread. Next the local
variables of scan() are not visible in scanThread.run().

-- 
--Bryan

> import socket
> import threading
> import traceback
> 
> 
> MAX_THREADS = 50
> 
> 
> class scanThread(threading.Thread):
>     def run(self):
>         try:
>             ss = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
>             ss.connect((ip, port_counter))
>             print "%s | %d OPEN" % (ip, port_counter)
>             ss.close()
>             print "scanned: ",port_counter,"\n"
>         except:
>             traceback.print_exc()
> # end class -------------------
> 
> 
> def scan(ip, begin, end):
>         port_counter = 0
> 	for port_counter in range(begin, end):
>             while threading < MAX_THREADS:
>                 scanThread().start()
> # end function -------------------
> scan("localhost", 0, 10000)
> 

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Showing content from http://mail.python.org/pipermail/python-list/2005-September/338685.html below:

threads/sockets quick question.