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():
      ...

Hope this helps!

--Hans
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