On Mar 30, 2019, at 12:30, MRAB <pyt...@mrabarnett.plus.com> wrote:
>
> I'd much prefer .lcut/.rcut to .cut_prefix/.cut_suffix, to match
> .lstrip/.rstrip.
I agree that we should use either l/r or something to do with start/end. We
already have two different ways to say left/start and right/end on the str
methods; adding a third way to say left/start/prefix seems silly.
But I don’t like cut. Or trim, or any of the other options. They’re all just
synonyms for strip; there’s nothing about any of these synonyms that tells you,
implies, or even helps you remember that strip takes an iterable of characters
and cut takes a substring (or is that a substring or tuple of substrings?)
instead of the other way around.
A name like lstrip_string would solve that.
But so would modifying lstrip to take keyword arguments:
s.lstrip("abc") # same as today
s.lstrip(chars="abc") # same as above
s.lstrip(string="abc") # the new functionality: only strip the whole thing
Also, this means that if we do want the substring-or-substrings thing, we don’t
have to use the old tuple idiom; since it’s a keyword-only param, we could just
as easily have a different keyword param that accepts any iterable of strings.
So when you have a set of prefixes, you don’t have to call
s.lcut(tuple(prefixes)), you just pass the set as-is to
s.lstrip(strings=prefixes)).
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