Introduction

croniter provides iteration for the datetime object with a cron like format.

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Website: https://github.com/kiorky/croniter

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Usage

A simple example:

>>> from croniter import croniter
>>> from datetime import datetime
>>> base = datetime(2010, 1, 25, 4, 46)
>>> iter = croniter('*/5 * * * *', base)  # every 5 minites
>>> print iter.get_next(datetime)   # 2010-01-25 04:50:00
>>> print iter.get_next(datetime)   # 2010-01-25 04:55:00
>>> print iter.get_next(datetime)   # 2010-01-25 05:00:00
>>>
>>> iter = croniter('2 4 * * mon,fri', base)  # 04:02 on every Monday and Friday
>>> print iter.get_next(datetime)   # 2010-01-26 04:02:00
>>> print iter.get_next(datetime)   # 2010-01-30 04:02:00
>>> print iter.get_next(datetime)   # 2010-02-02 04:02:00

All you need to know is how to use the constructor and the get_next method, the signature of these methods are listed below:

>>> def __init__(self, cron_format, start_time=time.time())

croniter iterates along with 'cron_format' from 'start_time'. cron_format is 'min hour day month day_of_week', you can refer to http://en.wikipedia.org/wiki/Cron for more details.:

>>> def get_next(self, ret_type=float)

get_next calculates the next value according to the cron expression and returns an object of type 'ret_type'. ret_type should be a 'float' or a 'datetime' object.

Supported added for get_prev method. (>= 0.2.0):

>>> base = datetime(2010, 8, 25)
>>> itr = croniter('0 0 1 * *', base)
>>> print itr.get_prev(datetime)  # 2010-08-01 00:00:00
>>> print itr.get_prev(datetime)  # 2010-07-01 00:00:00
>>> print itr.get_prev(datetime)  # 2010-06-01 00:00:00

Develop this package

git clone https://github.com/kiorky/croniter.git
cd croniter
virtualenv --no-site-packages venv
. venv/bin/activate
pip install --upgrade -r requirements/test.txt
py.test src

Make a new release

We use zest.fullreleaser, a great release infrastructure.

Do and follow these instructions :

. venv/bin/activate
pip install --upgrade -r requirements/release.txt
fullrelease

Contributors

Thanks to all who have contributed to this project! If you have contributed and your name is not listed below please let me know.

• mrmachine
• Hinnack
• shazow
• kiorky
• jlsandell
• mag009
• djmitche
• GreatCombinator
• chris-baynes
• ipartola
• yuzawa-san