[Python-Dev] PEP 562 (original) (raw)

Ivan Levkivskyi levkivskyi at gmail.com
Wed Nov 15 05:53:19 EST 2017

On 15 November 2017 at 08:43, Serhiy Storchaka <storchaka at gmail.com> wrote:

14.11.17 22:34, Ivan Levkivskyi пише:

This function will be called only if name is not found in the module through the normal attribute lookup.

It is worth to mention that using name as a module global will bypass getattr. And this is intentional, otherwise calling getattr for builtins will harm a performance. Good point!

Backwards compatibility and impact on performance

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What is affect on pydoc, word completion, inspect, pkgutil, unittest? This is rather gray area. I am not sure that we need to update them in any way, just the people who use getattr should be aware that some tools might not yet expect it. I will add a note to the PEP about this.

def keeppickleable(func):

func.name = func.name.replace('deprecated', '') func.qualname = func.qualname.replace('deprecated', '') return func

@keeppickleable def deprecatedoldfunction(arg, other): ... I would create more standard helpers (for deprecation, for lazy importing). This feature is helpful not by itself, but because it will be used for implementing new features. Using getattr directly will need to write a boilerplate code. Maybe when implementing these helper you will discover that this PEP needs some additions. But in which module these helpers should live?

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