Nick Coghlan wrote:
Filip Gruszczyński wrote:
I would appreciate any advice on this topic, even if this ticket would
be dismissed altogether, as I would like to learn as much as possible
on practices on developing Python.
Raymond's use case is valid, but the currently proposed method name is
way too long to be usable and the use of *args is a definite misfeature.
I suggest approaching the issue with the exact spec needed to cover the
problem Raymond described:
Add a method to strings that allows a format string to
be applied to an existing mapping without implicitly
converting the mapping to a dict first.
It occurs to me that Raymond's use case could be satisfied using
existing Python, by slightly changing the format string. After all,
str.format() supports mapping lookup already:
$ ./python.exe
Python 2.6.5+ (release26-maint:79421, Mar 25 2010, 08:51:39)
[GCC 4.2.1 (Apple Inc. build 5646) (dot 1)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> class Default(dict):
... def __missing__(self, key):
... return key
...
>>> s = '{m[name]} was born in {m[country]}'
>>> s.format(m=Default(name='Guido'))
'Guido was born in country'
>>>
Considering that, maybe the best thing is to do nothing. I'll update the
issue with this note.
--
Eric.
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