[Tutor] Reset while loop

[David]

When running the program cpu usage is 100%. Here is the part that is 
running;

def tail_it(fname, bufsize, linesep):
     """Update if monitored file time changes"""
     old_time = os.stat(fname).st_mtime
     while True:
         new_time = os.stat(fname).st_mtime
         if new_time > old_time:
             time.sleep(sec_to_wait)
             updated = return_tail(fname, bufsize, linesep)
             for i in updated:
                 print i
         old_time = new_time

It is waiting here;
new_time = os.stat(fname).st_mtime

Why would something like that happen and is there any way to fix it? The 
program is just for me to learn Python, if I wanted to tail a log file I 
would just use tail, but an understanding may help in the future.
thanks,
-david


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