Benjamin Peterson wrote:
2012/4/24 Mark Shannon <m...@hotpy.org>:
I'm not happy with this fix.
It's not perfect, but it's an improvement.
Admittedly code like:
class S(str):
__getattr__ = str.__add__
s = S('a')
print(S.b)
My typo, should be:
print(s.b)
(Instance not class)
This doesn't work.
is a little weird.
But I think it should work (ie print 'ab') properly.
This works without the patch.
class S(str):
__getattribute__ = str.__add__
s = S('a')
print(S.b)
Same typo,
this does work (with correct spelling :) )
Does it?
$ cat > x.py
class S(str):
__getattribute__ = str.__add__
s = S('a')
print(S.b)
$ python3 x.py
Traceback (most recent call last):
File "x.py", line 4, in <module>
print(S.b)
AttributeError: type object 'S' has no attribute 'b'
(Prints 'ab')
Also "slot wrapper" is a low-level implementation detail and
shouldn't impact the language semantics.
dict.__getitem__ is a slot wrapper; dict.__getitem__ is not.
str.__getitem__ is a slot wrapper; list.__getitem__ is not.
If any of these change then the semantics of the language changes.
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