In article <i3ud8e$p9e$0...@news.t-online.com>, Peter Otten <__pete...@web.de> wrote:
> Grant Edwards wrote: > > > On 2010-08-11, Tim Harig <user...@ilthio.net> wrote: > >> On 2010-08-11, RG <rnospa...@flownet.com> wrote: > >>> When stdin is not a tty, Python seems to buffer all the input through > >>> EOF before processing any of it: > >>> > >>> [...@mickey:~]$ cat | python > >>> print 123 > >>> print 456 <hit ctrl-D here> > >>> 123 > >>> 456 > >>> > >>> Is there a way to get Python to process input line-by-line the way it > >>> does when stdin is a TTY even when stdin is not a TTY? > >> > >> It would be much better to know the overall purpose of what you are > >> trying > >> to achieve. There are may be better ways (ie, sockets) depending what > >> you > >> are trying to do. Knowing your target platform would also be helpful. > >> > >> For the python interpeter itself, you can can get interactive behavior by > >> invoking it with the -i option. > > > > If you're talking about unbuffered stdin/stdout, the option is -u. > > > > I don't really see how the -i option is relevent -- it causes the > > interpreter to go into interactive mode after running the script. > > I'd say the following looks like what the OP was asking for: > > $ cat | python -i -c'import sys; sys.ps1=""' > print sys.stdin.isatty() > False > print 1 > 1 > print 2 > 2 That is indeed the behavior I'm looking for. > (Whether it's useful is yet another question) It's useful to me :-) I'm trying to access a python library from a program written in another language for which an equivalent library is not available. The easiest way to do that is to spawn a Python interpreter and interact with it through stdin/stdout. Thanks! rg -- http://mail.python.org/mailman/listinfo/python-list
