twblue/src/mysc/repeating_timer.py

35 lines
1.1 KiB
Python

import threading
class RepeatingTimer(threading.Thread):
"""Call a function after a specified number of seconds, it will then repeat again after the specified number of seconds
Note: If the function provided takes time to execute, this time is NOT taken from the next wait period
t = RepeatingTimer(30.0, f, args=[], kwargs={})
t.start()
t.cancel() # stop the timer's actions
"""
def __init__(self, interval, function, daemon=True, *args, **kwargs):
threading.Thread.__init__(self)
self.daemon = daemon
self.interval = float(interval)
self.function = function
self.args = args
self.kwargs = kwargs
self.finished = threading.Event()
def cancel(self):
"""Stop the timer if it hasn't finished yet"""
self.finished.set()
stop = cancel
def run(self):
while not self.finished.is_set():
self.finished.wait(self.interval)
if not self.finished.is_set(): #In case someone has canceled while waiting
# try:
self.function(*self.args, **self.kwargs)
# except:
# pass
# logging.exception("Execution failed. Function: %r args: %r and kwargs: %r" % (self.function, self.args, self.kwargs))