On Sat, 02 Jul 2011 11:40:46 +0200, Belisko Marek wrote: > just want to use poll method to get data from /proc file system. Use > simple code for it. Problem is it seems poll return POLLIN flag but > when I try to read data it's always empty. Could be a problem changes > are so fast that print can't print it?
poll() doesn't work for files; they are always readable. It's meant for pipes, sockets and character devices (ttys, etc). If you're looking for a way to find out when a file has changed, there isn't one (Linux has inotify, but that isn't portable and it doesn't work with /proc). The reason why fd.read() doesn't return any data after the first call is that you're already at EOF; you need to reset the file position with fd.seek(0) to read more data (however: for /proc, I would recommend closing the file and reopening it). -- http://mail.python.org/mailman/listinfo/python-list
