A python "port" of logcheck's logtail2.
Pygtail reads log file lines that have not been read. It will even handle log files that have been rotated.
From the command line:
Usage: pygtail.py [options] logfile Print log file lines that have not been read. Options: -h, --help show this help message and exit -o OFFSET_FILE, --offset-file=OFFSET_FILE File to which offset data is written (default: <logfile>.offset). -p, --paranoid Update the offset file every time we read a line (as opposed to only when we reach the end of the file). -n N, --every-n=N Update the offset file every N'th time we read a line (as opposed to only when we reach the end of the file). --no-copytruncate Don't support copytruncate-style log rotation. Instead, if the log file shrinks, print a warning.
In your code:
from pygtail import Pygtail for line in Pygtail("some.log"): sys.stdout.write(line)