A fix to bluepin

[Fulvio]

Hello List,

I'm very beginner on programming, I''m studing some fix on the Bluez's 
bluepin, which is rather vague to control the given input.

Code /start:
=========================================
def main(*args):
	if len(sys.argv) < 2:
		print "ERR"
		sys.exit()
	
	dir    = sys.argv[1]
	bdaddr = sys.argv[2]

	if len(sys.argv) > 3:
		name = sys.argv[3]
	else:
		name = ""

	title = "Bluetooth PIN Code"

	# Bluetooth spec recommends automatic strong random PIN generation.
	# So eventually we should implement that. 
	pin = { "PIN": "" }

	if dir == "out":
		mesg = "Outgoing connection to "
	else:
		mesg = "Incoming connection from "
	
	mesg = mesg + name + "[" + bdaddr + "]"

	if dialog(title, mesg, pin) == DLG_OK:
		pin["PIN"] = string.strip(pin["PIN"])
		for i in pin:
			if i not in digits:
				print "ERR"
				break

		if len(pin["PIN"]) >= 1 and len(pin["PIN"]) <= 16:
			print "PIN:" + pin["PIN"]
		else:
			print "ERR"
	else:
		print "ERR"

#
main()
=========================================
Code /end:

Assumed that digits is:
          from string import digits  (equal to "1234567890")
(Perhaps I could avoid such import ad assigned directly :-) )
Assumed that the purpose would be to don't print ERR but to return back to 
main.....
Therefore may I recursively call main() ?
Does it re-open a new window, if I do so?
Does it re-ask new args?

Thanks for the patience to give some input here
PS. sorry the code is in tabs not in space :-(

F