The iterator returned by re.finditer appears to not terminate if the
final match is empty, but rather keeps returning the final (empty) match.
Is this a bug in _sre? If so, I'll be happy to file it, though fixing
it is a bit beyond my _sre experience level at this point. The solution
would appear to be to either a check for duplicate match in
iterator.next(), or to increment position by one after returning an
empty match (which should be OK, because if a non-empty match started at
that location, we would have returned it instead of the empty match).
Code to illustrate the failure:
from re import finditer
last = None
for m in finditer( ".*", "asdf" ):
if last == m.span():
print "duplicate match:", last
break
print m.group(), m.span()
last = m.span()
---
asdf (0, 4)
(4, 4)
duplicate match: (4, 4)
---
findall works:
print re.findall( ".*", "asdf" )
['asdf', '']
Workaround is to explicitly check for a duplicate span, as I did above,
or to check for a duplicate end(), which avoids the final empty match
kb
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