[Python-3000] Useless methods in Queue module

Mike Klaas mike.klaas at gmail.com
Mon Jan 14 23:55:56 CET 2008

On 14-Jan-08, at 1:32 PM, Charles Merriam wrote:

> Not to be pedantic, but the major concern others are voicing is that
> is that queue size is not reliable and is therefore a potential source
> of hard to find threading bugs by naive users.   Why not just rename
> q.size() to the unweildy name of q.est_size()?

This is a misleading name.  The number returned from qsize() [not size 
()] is perfectly reliable, in the sense that it is the exact size of  
the queue at some instant in time.  The real concern is that qsize()  
 > 0 doesn't guarantee that a subsequent .get() will not block, nor  
that qsize() < maxsize guarantee that .put() will not block.   
Incidentally, I find this warning much less confusion than the vague  
"Because of multithreading semantics, this number is not reliable."  
in the docs.


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