On Sat, Apr 24, 2021 at 11:36 PM Stephen J. Turnbull
<turnbull.stephen...@u.tsukuba.ac.jp> wrote:
> Assuming that *exact* use case, wouldn't
>
> >>> class LowerableStr(str):
> ... def __format__(self, fmt):
> ... if fmt == 'lc':
> ... return self.lower()
> ... else:
> ... return str.__format__(self, fmt)
> ...
> >>> "{x} is {x:lc} in lowercase".format_map({'x' : LowerableStr("This")})
> 'This is this in lowercase'
>
> do? For generic x you'd have to do something a bit more complicated,
> but the basic strategy would be the same. Similarly, it shouldn't be
> hard to design a fairly generic wrapper class that allows you to map
> format codes to arbitrary functions.
Now also add in that you will need uppercase and titlecase, and then
allow actual formatting of the string as well as case selection. Then
make sure that every message you format can have every piece of text
supporting this, since you'll never know exactly what parts of what
messages may need this sort of manipulation. It won't look nearly as
simple any more.
ChrisA
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