tails a log and if certain stings are found it prints all but the first four parts of the line.

tail nagios

#!/usr/bin/python
from sh import tail
import string

for line in tail("-fn0", "/tmp/alert", _iter=True):
    if ("PASSIVE" and "OK") in line:
        nagios_alerts = line.split(" ")
        print repr(nagios_alerts[4:])
        print(len(nagios_alerts[4:]))