On Jul 28, 11:36 pm, Andrew Savige <[EMAIL PROTECTED]> wrote: (snipped)
> > Yes. Here's a simpler example without any backreferences: > > s = re.split(r'(?<=\d)(?=\D)', '1B2D3') > > That works in Perl but not in Python. > Is it that "chaining" assertions together like this is not supported in Python > re? > Or is that the case only in the split function? > The match objects returned by finditer return the expected span positions: >>> pat = re.compile(r'(?<=\d)(?=\D)') >>> s = '1B2D3' >>> for mobj in pat.finditer(s): ... print mobj.span() ... (1, 1) (3, 3) >From your original post: >>> pat = re.compile(r'(?<=(.))(?!\1)') >>> s = 'ABBBCC' >>> for mobj in pat.finditer(s): ... print mobj.span() ... (1, 1) (4, 4) (6, 6) So, it seems split doesn't split on what amounts to a zero-width assertion. I couldn't find this explanation from a quick look at the documentation, however. -- Hope this helps, Steven -- http://mail.python.org/mailman/listinfo/python-list
