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Introduction
============
DISCLAIMER
============
**UNMAINTAINED/ABANDONED CODE / DO NOT USE**
Due to the new EU Cyber Resilience Act (as European Union), even if it was
implied because there was no more activity, this repository is now
explicitly declared unmaintained.
The content does not meet the new regulatory requirements and therefore
cannot be deployed or distributed, especially in a European context.
This repository now remains online ONLY for public archiving, documentation
and education purposes and we ask everyone to respect this.
As stated, the maintainers stopped development and therefore all support
some time ago, and make this declaration on December 15, 2024.
We may also unpublish soon (as in the following monthes) any published
ressources tied to this project (pypi, the repositories,
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 minutes
>>> 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
>>>
>>> iter = croniter('2 4 1 * wed', base) # 04:02 on every Wednesday OR
on 1st day of month
>>> print(iter.get_next(datetime)) # 2010-01-27 04:02:00
>>> print(iter.get_next(datetime)) # 2010-02-01 04:02:00
>>> print(iter.get_next(datetime)) # 2010-02-03 04:02:00
>>>
>>> iter = croniter('2 4 1 * wed', base, day_or=False) # 04:02 on
every 1st day of the month if it is a Wednesday
>>> print(iter.get_next(datetime)) # 2010-09-01 04:02:00
>>> print(iter.get_next(datetime)) # 2010-12-01 04:02:00
>>> print(iter.get_next(datetime)) # 2011-06-01 04:02:00
>>>
>>> iter = croniter('0 0 * * sat#1,sun#2', base) # 1st Saturday, and
2nd Sunday of the month
>>> print(iter.get_next(datetime)) # 2010-02-06 00:00:00
>>>
>>> iter = croniter('0 0 * * 5#3,L5', base) # 3rd and last Friday of
the month
>>> print(iter.get_next(datetime)) # 2010-01-29 00:00:00
>>> print(iter.get_next(datetime)) # 2010-02-19 00:00:00
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(),
day_or=True)
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. The day_or
switch is used to control how croniter handles **day** and **day_of_week**
entries. Default option is the cron behaviour, which connects those
values using **OR**. If the switch is set to False, the values are
connected
using **AND**. This behaves like fcron and enables you to e.g. define a job
that
executes each 2nd Friday of a month by setting the days of month and the
weekday.
::
>>> 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
You can validate your crons using is_valid class method. (>= 0.3.18)::
>>> croniter.is_valid('0 0 1 * *') # True
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