Python module that grabs a list of Tor exits and checks IPs against the list

fetchexits.py

#!/usr/bin/python

import urllib2

def fetch():
	# Just a quick note: I feel there's no reason to blanket ban relay nodes.
	# A person runs a relay node as opposed to an exit to avoid the backlash
	# normally associated with running an exit. Relay operators shouldn't be
	# be punsihed for doing literally the least they can do to help out.
	# 
	# I'm not against Tor, but it's just not "for" certain things, due to abuse.
	#
	# So, long story short, this only returns exits.
	# Also, it doesn't take exit policies into account. 
	# It's a little hamhanded, but it's dead simple to implement.
	lists = ['http://torstatus.blutmagie.de/', 
	'https://torstatus.rueckgr.at/', 
	'http://tns.hermetix.org/']	
	allexits = []

	for exitlist in lists:
		for line in urllib2.urlopen(exitlist + "ip_list_exit.php/Tor_ip_list_EXIT.csv"):
			thisexit = line.replace('\n','')
			if thisexit not in allexits:
				allexits.append(thisexit)

	return allexits

def checkip(address):
	#Global variable prevents secondary scrapes for subsequent checks.
	#Scrape will happen again next time the script runs.
	#Pickle the result if you want to save it for later.
	global exits
	
	try: #If doing something to the variable fails, it doesn't exist
		garbage = type(exits)
	except NameError: #It failed. Let's make it exist.
		exits = fetch()
	
	return address in exits
	

if __name__ == "__main__":
	print 'Getting exits, this might take some time...'
	allexits = fetch()
	for exit in allexits:
		print exit
	print 'There are currently ' + str(len(allexits)) + ' Tor exit nodes.'
	print 'Also...'
	while True:
		if checkip(raw_input('Enter an IP and I\'ll check it against the list: ')):
			print 'Yes, that\'s a Tor exit.'
		else:
			print 'No, that is not a Tor exit.'