/usr/lib/python2.7/dist-packages/schedule/__init__.py is in python-schedule 0.3.2-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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Python job scheduling for humans.
An in-process scheduler for periodic jobs that uses the builder pattern
for configuration. Schedule lets you run Python functions (or any other
callable) periodically at pre-determined intervals using a simple,
human-friendly syntax.
Inspired by Addam Wiggins' article "Rethinking Cron" [1] and the
"clockwork" Ruby module [2][3].
Features:
- A simple to use API for scheduling jobs.
- Very lightweight and no external dependencies.
- Excellent test coverage.
- Works with Python 2.7 and 3.3
Usage:
>>> import schedule
>>> import time
>>> def job(message='stuff'):
>>> print("I'm working on:", message)
>>> schedule.every(10).minutes.do(job)
>>> schedule.every().hour.do(job, message='things')
>>> schedule.every().day.at("10:30").do(job)
>>> while True:
>>> schedule.run_pending()
>>> time.sleep(1)
[1] http://adam.heroku.com/past/2010/4/13/rethinking_cron/
[2] https://github.com/tomykaira/clockwork
[3] http://adam.heroku.com/past/2010/6/30/replace_cron_with_clockwork/
"""
import datetime
import functools
import logging
import time
logger = logging.getLogger('schedule')
class CancelJob(object):
pass
class Scheduler(object):
def __init__(self):
self.jobs = []
def run_pending(self):
"""Run all jobs that are scheduled to run.
Please note that it is *intended behavior that tick() does not
run missed jobs*. For example, if you've registered a job that
should run every minute and you only call tick() in one hour
increments then your job won't be run 60 times in between but
only once.
"""
runnable_jobs = (job for job in self.jobs if job.should_run)
for job in sorted(runnable_jobs):
self._run_job(job)
def run_all(self, delay_seconds=0):
"""Run all jobs regardless if they are scheduled to run or not.
A delay of `delay` seconds is added between each job. This helps
distribute system load generated by the jobs more evenly
over time."""
logger.info('Running *all* %i jobs with %is delay inbetween',
len(self.jobs), delay_seconds)
for job in self.jobs:
self._run_job(job)
time.sleep(delay_seconds)
def clear(self):
"""Deletes all scheduled jobs."""
del self.jobs[:]
def cancel_job(self, job):
"""Delete a scheduled job."""
try:
self.jobs.remove(job)
except ValueError:
pass
def every(self, interval=1):
"""Schedule a new periodic job."""
job = Job(interval)
self.jobs.append(job)
return job
def _run_job(self, job):
ret = job.run()
if isinstance(ret, CancelJob) or ret is CancelJob:
self.cancel_job(job)
@property
def next_run(self):
"""Datetime when the next job should run."""
if not self.jobs:
return None
return min(self.jobs).next_run
@property
def idle_seconds(self):
"""Number of seconds until `next_run`."""
return (self.next_run - datetime.datetime.now()).total_seconds()
class Job(object):
"""A periodic job as used by `Scheduler`."""
def __init__(self, interval):
self.interval = interval # pause interval * unit between runs
self.job_func = None # the job job_func to run
self.unit = None # time units, e.g. 'minutes', 'hours', ...
self.at_time = None # optional time at which this job runs
self.last_run = None # datetime of the last run
self.next_run = None # datetime of the next run
self.period = None # timedelta between runs, only valid for
self.start_day = None # Specific day of the week to start on
def __lt__(self, other):
"""PeriodicJobs are sortable based on the scheduled time
they run next."""
return self.next_run < other.next_run
def __repr__(self):
def format_time(t):
return t.strftime('%Y-%m-%d %H:%M:%S') if t else '[never]'
timestats = '(last run: %s, next run: %s)' % (
format_time(self.last_run), format_time(self.next_run))
if hasattr(self.job_func, '__name__'):
job_func_name = self.job_func.__name__
else:
job_func_name = repr(self.job_func)
args = [repr(x) for x in self.job_func.args]
kwargs = ['%s=%s' % (k, repr(v))
for k, v in self.job_func.keywords.items()]
call_repr = job_func_name + '(' + ', '.join(args + kwargs) + ')'
if self.at_time is not None:
return 'Every %s %s at %s do %s %s' % (
self.interval,
self.unit[:-1] if self.interval == 1 else self.unit,
self.at_time, call_repr, timestats)
else:
return 'Every %s %s do %s %s' % (
self.interval,
self.unit[:-1] if self.interval == 1 else self.unit,
call_repr, timestats)
@property
def second(self):
assert self.interval == 1
return self.seconds
@property
def seconds(self):
self.unit = 'seconds'
return self
@property
def minute(self):
assert self.interval == 1
return self.minutes
@property
def minutes(self):
self.unit = 'minutes'
return self
@property
def hour(self):
assert self.interval == 1
return self.hours
@property
def hours(self):
self.unit = 'hours'
return self
@property
def day(self):
assert self.interval == 1
return self.days
@property
def days(self):
self.unit = 'days'
return self
@property
def week(self):
assert self.interval == 1
return self.weeks
@property
def monday(self):
assert self.interval == 1
self.start_day = 'monday'
return self.weeks
@property
def tuesday(self):
assert self.interval == 1
self.start_day = 'tuesday'
return self.weeks
@property
def wednesday(self):
assert self.interval == 1
self.start_day = 'wednesday'
return self.weeks
@property
def thursday(self):
assert self.interval == 1
self.start_day = 'thursday'
return self.weeks
@property
def friday(self):
assert self.interval == 1
self.start_day = 'friday'
return self.weeks
@property
def saturday(self):
assert self.interval == 1
self.start_day = 'saturday'
return self.weeks
@property
def sunday(self):
assert self.interval == 1
self.start_day = 'sunday'
return self.weeks
@property
def weeks(self):
self.unit = 'weeks'
return self
def at(self, time_str):
"""Schedule the job every day at a specific time.
Calling this is only valid for jobs scheduled to run every
N day(s).
"""
assert self.unit in ('days', 'hours') or self.start_day
hour, minute = [t for t in time_str.split(':')]
minute = int(minute)
if self.unit == 'days' or self.start_day:
hour = int(hour)
assert 0 <= hour <= 23
elif self.unit == 'hours':
hour = 0
assert 0 <= minute <= 59
self.at_time = datetime.time(hour, minute)
return self
def do(self, job_func, *args, **kwargs):
"""Specifies the job_func that should be called every time the
job runs.
Any additional arguments are passed on to job_func when
the job runs.
"""
self.job_func = functools.partial(job_func, *args, **kwargs)
try:
functools.update_wrapper(self.job_func, job_func)
except AttributeError:
# job_funcs already wrapped by functools.partial won't have
# __name__, __module__ or __doc__ and the update_wrapper()
# call will fail.
pass
self._schedule_next_run()
return self
@property
def should_run(self):
"""True if the job should be run now."""
return datetime.datetime.now() >= self.next_run
def run(self):
"""Run the job and immediately reschedule it."""
logger.info('Running job %s', self)
ret = self.job_func()
self.last_run = datetime.datetime.now()
self._schedule_next_run()
return ret
def _schedule_next_run(self):
"""Compute the instant when this job should run next."""
# Allow *, ** magic temporarily:
# pylint: disable=W0142
assert self.unit in ('seconds', 'minutes', 'hours', 'days', 'weeks')
self.period = datetime.timedelta(**{self.unit: self.interval})
self.next_run = datetime.datetime.now() + self.period
if self.start_day is not None:
assert self.unit == 'weeks'
weekdays = (
'monday',
'tuesday',
'wednesday',
'thursday',
'friday',
'saturday',
'sunday'
)
assert self.start_day in weekdays
weekday = weekdays.index(self.start_day)
days_ahead = weekday - self.next_run.weekday()
if days_ahead <= 0: # Target day already happened this week
days_ahead += 7
self.next_run += datetime.timedelta(days_ahead) - self.period
if self.at_time is not None:
assert self.unit in ('days', 'hours') or self.start_day is not None
kwargs = {
'minute': self.at_time.minute,
'second': self.at_time.second,
'microsecond': 0
}
if self.unit == 'days' or self.start_day is not None:
kwargs['hour'] = self.at_time.hour
self.next_run = self.next_run.replace(**kwargs)
# If we are running for the first time, make sure we run
# at the specified time *today* (or *this hour*) as well
if not self.last_run:
now = datetime.datetime.now()
if (self.unit == 'days' and self.at_time > now.time() and
self.interval == 1):
self.next_run = self.next_run - datetime.timedelta(days=1)
elif self.unit == 'hours' and self.at_time.minute > now.minute:
self.next_run = self.next_run - datetime.timedelta(hours=1)
if self.start_day is not None and self.at_time is not None:
# Let's see if we will still make that time we specified today
if (self.next_run - datetime.datetime.now()).days >= 7:
self.next_run -= self.period
# The following methods are shortcuts for not having to
# create a Scheduler instance:
default_scheduler = Scheduler()
jobs = default_scheduler.jobs # todo: should this be a copy, e.g. jobs()?
def every(interval=1):
"""Schedule a new periodic job."""
return default_scheduler.every(interval)
def run_pending():
"""Run all jobs that are scheduled to run.
Please note that it is *intended behavior that run_pending()
does not run missed jobs*. For example, if you've registered a job
that should run every minute and you only call run_pending()
in one hour increments then your job won't be run 60 times in
between but only once.
"""
default_scheduler.run_pending()
def run_all(delay_seconds=0):
"""Run all jobs regardless if they are scheduled to run or not.
A delay of `delay` seconds is added between each job. This can help
to distribute the system load generated by the jobs more evenly over
time."""
default_scheduler.run_all(delay_seconds=delay_seconds)
def clear():
"""Deletes all scheduled jobs."""
default_scheduler.clear()
def cancel_job(job):
"""Delete a scheduled job."""
default_scheduler.cancel_job(job)
def next_run():
"""Datetime when the next job should run."""
return default_scheduler.next_run
def idle_seconds():
"""Number of seconds until `next_run`."""
return default_scheduler.idle_seconds
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