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Thu Mar 4 13:07:33 EST 2010 · http://mail.python.org/pipermail/python-list/2010-March/720697.html

Duncan Booth wrote:
> mk <mrkafk at gmail.com> wrote:
> 
>> Hm, apparently Python didn't spot that 'spam'*10 in a's values is really 
>> the same string, right?
> 
> If you want it to spot that then give it a hint that it should be looking 
> for identical strings:
> 
>  >>> a={}
>  >>> for i in range(10000000):
> ...     a[i]=intern('spam'*10)
> 
> should reduce your memory use somewhat.
> 
Better still, hoist the constant value out of the loop:

 >>> a={}
 >>> const = 'spam'*10
 >>> for i in range(10000000):
 ...     a[i] = const


regards
 Steve
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memory usage, temporary and otherwise