[Python-ideas] Using `or?` as the null coalescing operator

Ryan Gonzalez rymg19 at gmail.com
Mon Sep 28 16:33:03 CEST 2015



On September 28, 2015 5:50:15 AM CDT, Koos Zevenhoven <k7hoven at gmail.com> wrote:
>On Mon, Sep 28, 2015 at 10:13 AM, Nick Coghlan <ncoghlan at gmail.com>
>wrote:
>> On 25 September 2015 at 09:07, Alessio Bogon <youtux at gmail.com>
>wrote:
>>> I really like PEP 0505. The only thing that does not convince me is
>the `??` operator. I would like to know what you think of an
>alternative like `or?`:
>>>
>>> a_list = some_list or? []
>>> a_dict = some_dict or? {}
>>>
>
>And have the following syntax options been considered?
>
>a_list = some_list else []
>

This one's ambiguous. How would you parse:

x if a else b else c

As:

x if (a else b) else c

Or:

x if a else (b else c)

>a_list = some_list or [] if None
>
>-- Koos
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