[Python-Dev] Deprecate `from __future__ import unicode_literals`?

Serhiy Storchaka storchaka at gmail.com
Sat Dec 17 06:58:00 EST 2016


On 17.12.16 13:44, Christian Heimes wrote:
> On 2016-12-17 10:06, Serhiy Storchaka wrote:
>> On 16.12.16 21:24, Guido van Rossum wrote:
>>> e.g. the argument to getattr() -- I still hear of code that breaks due
>>> to this occasionally)
>>
>> What is the problem with unicode in getattr()? Unicode attribute name is
>> converted to str, and since the result is cached, this even don't add
>> much overhead.
>
> It breaks the str optimization of dicts. Dict with str-only keys are
> special-cased in Python 2.

getattr() converts a unicode to str and passes a str to PyObject_GetAttr().



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