Threading with queues

[Gib Bogle]

Stephen Hansen wrote:
> On Mon, Dec 21, 2009 at 3:12 PM, Gib Bogle
> <g.bogle at auckland.no.spam.ac.nz> wrote:
>>  #spawn a pool of threads, and pass them queue instance
>>  for i in range(5):
>>    t = ThreadUrl(queue,i)
>>    t.setDaemon(True)
>>    t.start()
>>
>>  #populate queue with data
>>    for host in hosts:
>>      queue.put(host)
> 
> This is indented over one indentation level too much. You want it to
> be at the same level as the for above. Here, its at the same level
> with "t" -- meaning this entire loop gets repeated five times.
> 
> I sorta really recommend a tab width of 4 spaces, not 2 :) At 2, its
> _really_ hard (especially if you're newer to Python) to see these
> kinds of issues and since indentation is program logic and structure
> in Python, that's bad... especially since your comment is indented to
> the right level, but the code isn't :)
> 
> --S

It turns out that this code isn't a great demo of the advantages of threading, 
on my system anyway.  The time taken to execute doesn't vary much when the 
number of threads is set anywhere from 1 to 6.