Thanks for the reply! Is this really deserving of a PEP? It's such a minor
change in the language, can't it be resolved as a python issue?
Out of curiosity, why have you always resisted changing this?
On Tue, Feb 4, 2020 at 2:08 AM Guido van Rossum <gu...@python.org> wrote:
> I’ve always resisted changing this, but it keeps coming up, and in other
> cases we don’t restrict the grammar (except when there are real
> ambiguities). So maybe the SC can accept a PRP for this?
>
> On Mon, Feb 3, 2020 at 15:47 Ben Avrahami <avrahami....@gmail.com> wrote:
>
>> Hi all, decorators are a very powerful feature in python, but it's syntax
>> is strangely restrictive.
>>
>> decorator ::= "@" dotted_name ["(" [argument_list [","]] ")"] NEWLINE
>>
>> for 99% of cases this is not a hindrance, but sometimes we'd rather be
>> able to use full expression syntax. consider the following example (using
>> PyQt):
>>
>> # make 10 buttons
>> buttons = [QPushButton(f'button #{i}') for i in range(10)]
>> # for now we only want to bind an event to the first button
>> @buttons[0].clicked.connect
>> def foo():
>> ... # do whatever
>>
>> in cases such as this, it would be useful to have any expression
>> acceptable as a decorator.
>>
>> In addition to other use cases such as chained function calling
>> (@buttons_dict.get("foo"). clicked.connect), the restrictiveness of the
>> decorator syntax seems like a strange oversight. Arbitrary expressions are
>> already allowed in decorator lines as arguments, so allowing them as the
>> called decorator shouldn't be too difficult.
>>
>> Any thoughts on this?
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> --
> --Guido (mobile)
>
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