why not add an identity function to the builtins?
@noop(buttons[0].clicked.connect)
def foo():
... # do whatever
On 2020-02-03 9:08 p.m., Guido van Rossum 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
<mailto: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?
_______________________________________________
Python-ideas mailing list -- python-ideas@python.org
<mailto:python-ideas@python.org>
To unsubscribe send an email to python-ideas-le...@python.org
<mailto:python-ideas-le...@python.org>
https://mail.python.org/mailman3/lists/python-ideas.python.org/
Message archived at
https://mail.python.org/archives/list/python-ideas@python.org/message/WOWD4P323DYDIGUQVWMESDWUG6QOW4MP/
Code of Conduct: http://python.org/psf/codeofconduct/
--
--Guido (mobile)
_______________________________________________
Python-ideas mailing list -- python-ideas@python.org
To unsubscribe send an email to python-ideas-le...@python.org
https://mail.python.org/mailman3/lists/python-ideas.python.org/
Message archived at
https://mail.python.org/archives/list/python-ideas@python.org/message/FKE7ZFGUDCU5WVOE2QTD5XGMCNCOMETV/
Code of Conduct: http://python.org/psf/codeofconduct/
_______________________________________________
Python-ideas mailing list -- python-ideas@python.org
To unsubscribe send an email to python-ideas-le...@python.org
https://mail.python.org/mailman3/lists/python-ideas.python.org/
Message archived at
https://mail.python.org/archives/list/python-ideas@python.org/message/VZKMMXMBKC3MAYXYIWPNVE6Z23L4W2MJ/
Code of Conduct: http://python.org/psf/codeofconduct/
