Okay, my conclusion is
def f((a)=5)
is wrong, and the code should be changed to report a better error
message. I'll file a bug against that.
and I'm going with Brett suggestion that
[x for x in 1,]
is not supported because it's almost certainly a programming error. I
think therefore the comment in the Grammar file is distracting. As
comments can be.
On Feb 20, 2008 3:08 AM, Steve Holden <[EMAIL PROTECTED]> wrote:
> The one that surprised me was the legality of
>
> def eggs((a, )=c):
> pass
>
> That just seems like unpacking-abuse to me.
Yep. Here's another abuse, since I can't figure when someone needs a
destructuring del statement.
>>> class X(object): pass
...
>>> X.a = 123
>>> X.b = "hello"
>>> X.c = 9.801
>>> X.a, X.b, X.c
(123, 'hello', 9.8010000000000002)
>>> del (X.a, (X.b, (X.c,)))
>>> X.a, X.b, X.c
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
AttributeError: type object 'X' has no attribute 'a'
>>>
Is this going to be possible in Python3k?
> You really *have* been poking around in little-known crevices, haven't you?
Like this bug from 2.5, fixed in 2.6
>>> from __future__ import with_statement
>>> with f(x=5, 6):
... pass
...
ValueError: field context_expr is required for With
:)
Andrew
[EMAIL PROTECTED]
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