tail -f with python

[Roy Marteen]

Hi,

How can I write in Python something like 'tail -f filename'? I mean, when
there is an append to the file, it will be displayed real time.

I tried this:

while 1:
    line = open('test', 'r').readline()
    print line

But it keeps looping, eventhough there is no change (append) in file
'test'. Please help, and thanks very much.