> what makes you think a match object is immutable?
Because you cannot modify their state.
> import array, sre
>
> a = array.array("c", "abcde")
> m = sre.search("bcd", a)
> print m.group(0)
a1 = m.group(0)
a1[0]='z'
print m.group(0)
So you'd have to modify a, to modify m.group(0). To catch this case,
you might want to do
def copy_match(m):
g = m.group(0)
if copy(g) is not g:
raise KeyError # will be re-raised as copy.Error
return g
That will restore backwards compatibility with pre, which is what the
submitter of the bug requested.
Regards,
Martin
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