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Flavio Preto schrieb:
> Hi,
>
> I have a doubt. Supose that i have the minimun class below:
>
> class db:
> def __init__(self):
> self.db = {}
> def read(self, key):
> return self.db[key]
> def write(self, key, value):
> self.db[key] = value
>
>
> and an object of this class is shared among some threads. Is it possible
> that in a read, the method return a value that is not an old or a new value?
> In other words, is it possible that a 'read' return (due to a 'write' at the
> same time by another thread) an invalid value that was never supposed to be
> there?
>
> Thanks,
> Flavio Preto
>
>
Make the class thread safe by using Lock or RLock ... that will save you
a lot of trouble.
Your limited example might or might not work, but once your class gets
more complex you will most likely run into serious problems.
Greetings
Nils
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