On Mon, Sep 28, 2015 at 10:13 AM, Nick Coghlan wrote:

On 25 September 2015 at 09:07, Alessio Bogon 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 [] a_list = some_list or [] if None -- Koos

On 28 September 2015 at 20:50, Koos Zevenhoven wrote:

On Mon, Sep 28, 2015 at 10:13 AM, Nick Coghlan wrote:

...

On 25 September 2015 at 09:07, Alessio Bogon 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 []

In addition to the syntactic ambiguity Ryan notes, there's no hint here that we're using "some_list is not None" as the condition rather than "bool(some_list)"

a_list = some_list or [] if None

This one isn't supportable at the language grammar level - by the time we get to the "if" token, the parser will have already interpreted the first part as "some_list or []". Cheers, Nick. -- Nick Coghlan | ncoghlan@gmail.com | Brisbane, Australia