On 08/06/2022 15:40, Eric V. Smith via Python-ideas wrote:
On 6/7/2022 4:59 PM, Chris Angelico wrote:
On Wed, 8 Jun 2022 at 00:36, <martineznicolas41...@gmail.com> wrote:
Hello!
Do you know if there has been discussions around why is the default
argument is positional only in the dict methods get and pop?
I think
```
d.get(key, default=3)
```
way more readable than
```
d.get(key, 3)
```
specially since max and min builtin functions use default as a
keyword argument.
With min and max, it MUST be a keyword argument, because positional
arguments are the values to be compared. So I think the main reason is
"because nobody ever bothered to do it". If there's enough value in
it, that could probably be changed, although mere consistency alone
isn't a very strong argument.
I suspect it's been this way because the API is so old. Now that we
have Argument Clinic it would be easier to implement as a keyword
argument. But there may also be a performance issue with keyword
arguments vs. positional. People are touchy when it comes to dicts!
Eric
True (and rightly so). But all that is required is that there is no
significant slow-down when the positional argument is used.
Does that sound feasible?
People can always choose not to use the keyword form.
Best wishes
Rob Cliffe
_______________________________________________
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/73OOS3YPUDTZVWFJ5V44X66XZCNXRQV6/
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/LMVZXUZQAJ4PRKWGTQDP45FS5YDRKRZG/
Code of Conduct: http://python.org/psf/codeofconduct/
