"Steven D'Aprano" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> On Wed, 17 Oct 2007 13:41:06 +0200, Hrvoje Niksic wrote:
>
>> The current implementation of += uses __add__ for addition and __iadd__
>> for addition that may or may not be in-place. I'd like to know the
>> rationale for that design.
>
> Everything you need is in the PEP:
>
> http://www.python.org/dev/peps/pep-0203/
>
>
>
> --
> Steven.
Which illustrates that the proposal, while simplified for implementation,
is not exactly what was desired*
""" is both more readable and less error prone, because it is
instantly obvious to the reader that it is <x> that is being
changed, and not <x> that is being replaced
"""
As we see from this thread, it is not instantly obvious to the reader;
the meaning of "changed, not replaced" is ambiguous.
[david]
* That is, unless ambiguity was the desideratum
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