On Wed, Apr 3, 2013 at 1:53 AM, Steven D'Aprano
<steve+comp.lang.pyt...@pearwood.info> wrote:
> (sys.getsizeof(s) - sys.getsizeof(''))/len(s)
>>> s = '\x80\x81\x82\x83\x84\x85'
>>> len(s)
6
>>> import sys
>>> sys.getsizeof(s)
43
>>> sys.getsizeof(s) - sys.getsizeof('')
18
>>> (sys.getsizeof(s) - sys.getsizeof('')) / len(s)
3.0
I didn't know there was a 3-byte-width representation. :-)
More seriously, it fails because '' is ASCII and s is not, and the
overhead for the two strings is different.
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