How to implement an automatically expiring variable in python? For example, Let the program running For one hour. I want implement an array of 6 variables, each variable in array will be automatically deleted themselves after 10 mins. And after 1 hour, there will be no variable in the array.
you can create a background process that check how much time it's passed, and del the right item... or if you want to create a subclass of list wich deletes it's contens after a certain time you can do the same thing, just calling it in init
def __init__(self, time):
#run subprocess to chek_espired elements
edit:
i wrote an example, but it can be done much better!
class MyList(list):
def __init__(self,elems, expires_time):
list.__init__(self, elems)
self.created = time.time()
self.expires_time = expires_time
def __getitem__(self, index):
t = time.time()
print t - self.created
if t - self.created > self.expires_time:
self.created += self.expires_time
self.pop(index)
self.__getitem__(index)
return list.__getitem__(self, index)
ps of course you can easily raise a personal error if the program try to get the index from an empty list