On Fri, Aug 27, 2010 at 10:57 PM, sarah <maral.nikfar at gmail.com> wrote: > i want to know that what this function returns??? > > and what does this function do?? RTFM: http://docs.python.org/tutorial/inputoutput.html#methods-of-file-objects Honestly, it's the 2nd google hit for "python readline". Regards, Chris