[Python-Dev] replace on empty strings
Guido van Rossum
guido at python.org
Thu May 25 03:33:47 CEST 2006
On 5/24/06, Greg Ewing <greg.ewing at canterbury.ac.nz> wrote:
> Fredrik Lundh wrote:
> > so, which one is correct ?
> > Python 2.4.3
> > >>> "".replace("", "a")
> > ''
> > >>> u"".replace(u"", u"a")
> > u'a'
> Probably there shouldn't be any "correct" in this case,
> i.e. the result of replacing an empty string should be
> undefined (because any string contains infinitely many
> empty substrings).
No. That's what older versions of Python did, and it was changed to
the current behavior, except someone screwed up the edge case for
--Guido van Rossum (home page: http://www.python.org/~guido/)
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