[Python-Dev] PEP 362: 4th edition (original) (raw)

Nick Coghlan ncoghlan at gmail.com
Tue Jun 19 04:06:40 CEST 2012


On Tue, Jun 19, 2012 at 12:00 PM, Yury Selivanov <yselivanov.ml at gmail.com> wrote:

On 2012-06-18, at 9:36 PM, Nick Coghlan wrote:

So keep the current copying semantics for Signature objects (i.e. creating new copies of the Parameter objects as well), but call it a shallow copy rather than a deep copy. Make it clear in the documentation that any defaults and annotations are still shared with the underlying callable. So, 'Signature.deepcopy()' -> 'Signature.shallowcopy()'?  Or make it private - 'Signature.shallowcopy()'?

I'd just call it Signature.copy :)

You're not doing anything unusual here, just declaring that the list of parameters is a part of the Signature object's state, and thus even a shallow copy shouldn't share the parameter objects.

Cheers, Nick.

-- Nick Coghlan   |   ncoghlan at gmail.com   |   Brisbane, Australia



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