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Re: [Python-Dev] In-place operators Hrvoje Niksic Wed Mar 18 05:00:53 2009 

Martin v. Löwis wrote:

Certainly, the doc string is wrong:

  isub(a, b) -- Same as a -= b.

That's not quite the same - you would have to write

  a = isub(a, b) -- Same as a -= b.
It seems a perfectly fine solution is simply to fix the docstring, exactly like that: 

a = isub(a, b) -- Same as a -= b.
This both corrects the error when using isub with immutable types and educates user as to how a -= b actually works. 
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