The sched
模块正是用于此目的:
from __future__ import division
import sched
import time
scheduler = sched.scheduler(time.time, time.sleep)
def schedule_it(frequency, duration, callable, *args):
no_of_events = int( duration / frequency )
priority = 1 # not used, lets you assign execution order to events scheduled for the same time
for i in xrange( no_of_events ):
delay = i * frequency
scheduler.enter( delay, priority, callable, args)
def printer(x):
print x
# execute printer 30 times a second for 60 seconds
schedule_it(1/30, 60, printer, 'hello')
scheduler.run()
对于线程环境,使用sched.scheduler
可以替换为threading.Timer
:
from __future__ import division
import time
import threading
def schedule_it(frequency, duration, callable, *args, **kwargs):
no_of_events = int( duration / frequency )
for i in xrange( no_of_events ):
delay = i * frequency
threading.Timer(delay, callable, args=args, kwargs=kwargs).start()
def printer(x):
print x
schedule_it(5, 10, printer, 'hello')