Antoine Pitrou wrote:
On Tue, 28 Feb 2012 12:45:54 +0100
Victor Stinner <victor.stin...@haypocalc.com> wrote:
I think you need to elaborate on your use cases further, ...
A frozendict can be used as a member of a set or as a key in a dictionary.
For example, frozendict is indirectly needed when you want to use an
object as a key of a dict, whereas one attribute of this object is a
dict.
It isn't. You just have to define __hash__ correctly.
frozendict helps also in threading and multiprocessing.
How so?
Inter process/task communication requires copying. Inter/intra thread
communication uses reference semantics. To ensure these are the same,
the objects used in communication must be immutable.
Cheers,
Mark.
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