On Fri, May 16, 2008 at 6:40 PM, Gary Herron <[EMAIL PROTECTED]> wrote: > [EMAIL PROTECTED] wrote: >> >> On 16 mai, 23:28, Hans Nowak <[EMAIL PROTECTED]> wrote: >> >>> >>> Dan Upton wrote: >>> >>>> >>>> for pid in procs_dict: >>>> if procs_dict[pid].poll() != None >>>> # do the counter updates >>>> del procs_dict[pid] >>>> The problem: >>>> RuntimeError: dictionary changed size during iteration >>>> >>> >>> I don't know if the setup with the pids in a dictionary is the best way >>> to >>> manage a pool of processes... I'll leave it others, presumably more >>> knowledgable, to comment on that. :-) But I can tell you how to solve >>> the >>> immediate problem: >>> >>> for pid in procs_dict.keys(): >>> > > No, keys() produces a list (which is what is wanted here). > It's iterkeys() that produces an iterator which would reproduce the OP's > problem. > > And then, in Python3, keys() produces something else altogether (call a view > of the dictionary) which would provoke the same problem, so yet another > solution would have to be found then.
In Python 3.0, list(procs_dict.keys()) would have the same effect. > Gary Herron > >> >> I'm afraid this will do the same exact thing. A for loop on a dict >> iterates over the dict keys, so both statements are strictly >> equivalent from a practical POV. >> -- >> http://mail.python.org/mailman/listinfo/python-list >> > > -- > http://mail.python.org/mailman/listinfo/python-list > -- Eduardo de Oliveira Padoan http://www.advogato.org/person/eopadoan/ http://twitter.com/edcrypt Bookmarks: http://del.icio.us/edcrypt -- http://mail.python.org/mailman/listinfo/python-list
