Dynamic public ip address finder

PublicIP.py

"""
Public IP finder project v1.0 by Alex Avlonitis http://alex.avlonitis.me
"""
import urllib
import re
import os
import smtplib

#######SMTP CONFIGURATION#######
def emails():
	username = "your email"
	password = "your password"
	fromaddr = "from email@"
	toaddr = "to email@"
	server = smtplib.SMTP('smtp.live.com', 587)
	server.starttls()
	server.login(username, password)
	server.sendmail(fromaddr, toaddr, "the current public IP is: "+stringos)
	server.quit()

appdata = os.getenv('APPDATA')
path = appdata+"\ips.txt"
url = "http://showmyip.gr"

print url

r = urllib.urlopen(url).read()

ip = re.findall(r"\d{1,3}\.\d{1,3}\.\d{1,3}.\d{1,3}", r)  # it finds only the ip part from showmyip.gr

stringos = str(ip)

if not os.path.isfile(path):	#if the ips.txt doesn't exist, it creates it and then it writes the ip and sends the email
	file = open(path,"w")
	file = open(path,"r")
else:
	file = open(path,"r")		#if the file already exists 

if file.readline() == stringos: # compares the ip from the file with the website's one, if it's the same it doesn't do anything
	file.close()
else:
	file = open(path,"w")		# if it's different, it overwrites the file and then sends an email
	file.write(stringos)
	file.close()
	emails()