import urllib2
import re

def lookfor(string, url): 
    file = urllib2.urlopen(url)
    text = file.readlines()
    for line in text:
        if re.match("(.*)"+string+"(.*)", line):
            print line;
        else:
            print "Line doesn't contain requested string."
    file.close()

done = False

while (done == False):
    userstring = input("What string do you want to search for?");
    userurl = input("What URL do you want to search for?");
    print lookfor(userstring, userurl);
    finish = raw_input("Are you finished? Y/N")
    if (finish == "Y"):
        done = True;
    elif (finish == "N"):
        done = False;