[Python-Dev] PEP 520: Ordered Class Definition Namespace (original) (raw)

Victor Stinner victor.stinner at gmail.com
Wed Jun 8 04:07:27 EDT 2016

Abstract ========

This PEP changes the default class definition namespace to OrderedDict. Furthermore, the order in which the attributes are defined in each class body will now be preserved in type._definitionorder_. This allows introspection of the original definition order, e.g. by class decorators. Note: just to be clear, this PEP is not about changing _dict_ for classes to OrderedDict.

What is the cost in term of performance?

What can be slower: define a new class and/or instanciate a class?

Victor

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