Re: [Python-ideas] set.add could return True or False

On 15Mar2012 02:26, Matt Joiner anacrolix@gmail.com wrote: | This is an example only. [... racy stuff ...]

Then please provide a realistic nonracy example.

And also, what's your use case for "Adding an element that is already present often constitutes an error in my code"? And how is it not addressed by:

b.update( (a,) )

Cheers,