Matthew Barnett added the comment:
There's also the fact that the match object keeps a reference to the target
string anyway:
>>> import re
>>> t = memoryview(b"a")
>>> t
<memory at 0x0100F110>
>>> m = re.match(b"a", t)
>>> m.string
<memory at 0x0100F110>
On that subject, buried in the source code (_sre.c) is the comment:
"""
/* FIXME: implement setattr("string", None) as a special case (to
detach the associated string, if any */
"""
In the regex module I added a method "detach_string" to perform that function.
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<http://bugs.python.org/issue18468>
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