On Fri, Mar 20, 2020 at 3:28 PM Victor Stinner <[email protected]> wrote:
> > The builtin ``str`` class will gain two new methods with roughly the
> > following behavior::
> >
> > def cutprefix(self: str, pre: str, /) -> str:
> > if self.startswith(pre):
> > return self[len(pre):]
> > return self[:]
>
I tend to be mistrustful of code that tries to guess the best thing to do,
when something expected isn't found.
How about:
def cutprefix(self: str, pre: str, raise_on_no_match: bool=False, /) -> str:
if self.startswith(pre):
return self[len(pre):]
if raise_on_no_match:
raise ValueError('prefix not found')
return self[:]
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