> > On Sep 3, 2019, at 10:49 AM, Peter Otten <__pete...@web.de> wrote: > > Israel Brewster wrote: > >> When using pool.imap to apply a function over a list of values, what is >> the proper way to pass additional arguments to the function, specifically >> in my case a Queue that the process can use to communicate back to the >> main thread (for the purpose of reporting progress)? I have seen >> suggestions of using starmap, but this doesn’t appear to have a “lazy” >> variant, which I have found to be very beneficial in my use case. The >> Queue is the same one for all processes, if that makes a difference. >> >> I could just make the Queue global, but I have always been told not too. >> Perhaps this is an exception? > > How about wrapping the function into another function that takes only one > argument? A concise way is to do that with functools.partial(): > > def f(value, queue): ... > > pool.imap(partial(f, queue=...), values)
That looks like exactly what I was looking for. I’ll give it a shot. Thanks! --- Israel Brewster Software Engineer Alaska Volcano Observatory Geophysical Institute - UAF 2156 Koyukuk Drive Fairbanks AK 99775-7320 Work: 907-474-5172 cell: 907-328-9145 > > > >> >> --- >> Israel Brewster >> Software Engineer >> Alaska Volcano Observatory >> Geophysical Institute - UAF >> 2156 Koyukuk Drive >> Fairbanks AK 99775-7320 >> Work: 907-474-5172 >> cell: 907-328-9145 >> > > > -- > https://mail.python.org/mailman/listinfo/python-list -- https://mail.python.org/mailman/listinfo/python-list
