PEP 218 Re: ANN: set-0.1 module available

[Erik Max Francis]

Huaiyu Zhu wrote:

> The solution appears to be:
> - Allow mutable and immutable flavors of objects.
> - Mutable objects are hashed by identity.
> - Immutable objectas are hashed by content.
> 
> No change would then hanve the undesirable effect you described.

But then you can easily have collisions by value between the mutable and
immutable objects.  That doesn't seem like a very good implementation of
a set.

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