On 5/10/18 12:28 PM, Facundo Batista wrote:
2018-05-10 10:34 GMT-03:00 Chris Angelico <ros...@gmail.com>:
Ideally, it will handle *any* iterable.
If it's to handle arbitrary iterables, it can't be the normal style of
"take this string, pass it to the object's __format__ method, and let
it interpret it". That's why I suggested a bang notation instead. We
have some already:
Yes, I think it fits better, as it's not just a formatting, it's more
an "operation"...
A "!j" flag
could take an iterable, format each element using the given format,
and then join them. The letter "j" makes good sense then, as it
Where would you indicate the separator if we use the bang notation?
You would have to wedge it in before the colon. Something like:
f'{lst!j, :20}'
But then you couldn't have a colon in the separator. And this would be
our first conversion character to be more than a single character.
I'm opposed to this proposal. Just call str.join(), or write a helper
function or class (depending on what you're trying to do). It's not
worth complicating what's already a complicated topic.
Eric
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