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Merge #17435: Don't use mutable default values in Timer.

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Patch by Denver Coneybeare with some test modifications by me.
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R David Murray 2013-03-30 17:22:30 -04:00
commit 5cbf3a0d6e
4 changed files with 37 additions and 17 deletions
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8
Lib/threading.py
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@ -807,17 +807,17 @@ class Thread:
class Timer(Thread):
"""Call a function after a specified number of seconds:
t = Timer(30.0, f, args=[], kwargs={})
t = Timer(30.0, f, args=None, kwargs=None)
t.start()
t.cancel() # stop the timer's action if it's still waiting
"""
def __init__(self, interval, function, args=[], kwargs={}):
def __init__(self, interval, function, args=None, kwargs=None):
Thread.__init__(self)
self.interval = interval
self.function = function
self.args = args
self.kwargs = kwargs
self.args = args if args is not None else []
self.kwargs = kwargs if kwargs is not None else {}
self.finished = Event()
def cancel(self):