Create crontab with python-crontab in Python?

Question

I am trying to add a line to my system user's crontab, from a Python script which uses the package python-crontab. My crontab file does not exist yet, and when I run this code, nothing happens (no errors, no results, no creation of crontab file):

from crontab import CronTab

cron = CronTab(user=True)
# cron = CronTab(user='my_user') I tried this line too without any results

job = cron.new(command='python3 /opt/my_script.py')

job.minute.on(2)
job.hour.on(12)

True == job.is_valid()

Am I missing anything?

I think getting user cron should be: user_cron = CronTab('user_name'), rest seems correct. — Destructor
– Destructor, Commented Jun 6, 2014 at 10:21
True == job.is_valid() does nothing. You should use assert job.is_valid() — Eric
– Eric, Commented Jun 6, 2014 at 10:37

nsmyself · Accepted Answer · 2014-06-06 10:57:30Z

3

You need to save the cronjob, that's all that's missing:

#!/bin/python 

from crontab import CronTab

cron = CronTab(user=True)

job = cron.new(command='python3 /opt/my_script.py')
job.minute.on(2)
job.hour.on(12)

cron.write()

edited Jun 6, 2014 at 10:57

answered Jun 6, 2014 at 10:29

nsmyself

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1 Comment

forvas Over a year ago

I have realized I had not read that part on the tutorial just before reading your post. Thank you of course.

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