On 2012-02-16, MRAB <pyt...@mrabarnett.plus.com> wrote: > On 16/02/2012 23:10, Emeka wrote: >> Hello All, >> >> I know about seek and tell while using readline. What about if I am >> using read, and I want to undo the last character I just read(to return >> it back to the stream). How do I achieve this? >> > Try: > > f.seek(-1, 1) > > It seeks -1 relative to the current position (the second > argument defaults to 0 for relative to start of file).
Unless it's a stream opened in binary mode this will not work. You'd need to maintain a n-character length buffer instead, with n being the maximum number of characters you'd like to be able to put back. -- Neil Cerutti -- http://mail.python.org/mailman/listinfo/python-list
