CronExpression

This module provides an easy to use interface for cron-like task scheduling. This module is forked from the orginal cronex. This one comes with support for cronjobs scheduled per second.

Examples

Standard Cron Fields:

>>> job = CronExpression("0 0 0 * * 1-5/2 find /var/log -delete")
>>> job.check_trigger((2010, 11, 17, 0, 0, 0))
True
>>> job.check_trigger((2012, 12, 21, 0 , 0, 0))
False

Periodic Trigger:

>>> job = CronExpression("0, 0 %9 * * * Feed 'it'", (2010, 5, 1, 7, 0, -6, 0))
>>> job.comment
"Feed 'it'"
>>> job.check_trigger((2010, 5, 1, 7, 0, 0), utc_offset=-6)
True
>>> job.check_trigger((2010, 5, 1, 16, 0, 0), utc_offset=-6)
True
>>> job.check_trigger((2010, 5, 2, 1, 0, 0), utc_offset=-6)
True

Simple cron scheduler in less than ten lines:

import time
import os
import cronex

while True:
    for line in open("crontab"):
        job = cronex.CronExpression(line.strip())

        if job.check_trigger(time.gmtime(time.time())[:6]):
            os.system(job.comment)

    time.sleep(1)