On Mon, 2011-03-28 at 12:58 +0100, Tim Wintle wrote: > On Mon, 2011-03-28 at 12:42 +0200, Esben Nielsen wrote: > > We are making a prototype program in Python. I discovered the output was > > non-deterministic, i.e. I rerun the program on the same input files and > > get different output files. We do not use any random calls, nor > > threading. > > > > One of us thought it could be set and dictionaries not always yielding > > the same results. I, however, would think that given the exact same > > operations, a set/dictionary would always yield the same results. Am I > > correct? Or could different runs of the same program yield different > > results due to, say, different memory locations? > > If you're using id() at any point (e.g. in __hash__ ) then that would > lead to non-deterministic behaviour. > I changed my code to use other kinds of hash. That helped! :-) Thanks!
> obviously so would time.time() etc. I didn't use those :-) > > Esben -- http://mail.python.org/mailman/listinfo/python-list