On Mar 2, 6:18 pm, Raymond Hettinger <pyt...@rcn.com> wrote: > On Mar 2, 8:29 am, Veloz <michaelve...@gmail.com> wrote: > > > Hi all > > I'm looking for a queue that I can use with multiprocessing, which has > > a peek method. > > > I've seen some discussion about queue.peek but don't see anything in > > the docs about it. > > > Does python have a queue class with peek semantics? > > Am curious about your use case? Why peek at something > that could be gone by the time you want to use it. > > val = q.peek() > if something_i_want(val): > v2 = q.get() # this could be different than val > > Wouldn't it be better to just get() the value and return if you don't > need it? > > val = q.peek() > if not something_i_want(val): > q.put(val)
What I have found myself wanting when thinking of this pattern is a "q.put_at_front_of_queue(val)" method. I've never actually used this because of not having such a method. Not that it's that much of an issue as I've never been completely stuck and usually found a way to solve whatever I was trying to do without peeking, which could be argued as a better design in the first place. I was just wondering if other people ever missed the "q.put_at_front_of_queue()" method or if it is just me. Regards Floris PS: assuming "val = q.get()" on the first line -- http://mail.python.org/mailman/listinfo/python-list
