[Python-Dev] anonymous blocks
Phillip J. Eby
pje at telecommunity.com
Tue Apr 19 21:39:56 CEST 2005
At 11:55 AM 04/19/2005 -0700, Guido van Rossum wrote:
>I'd recommend this:
>tri = self.subcalculation("The quick brown fox jumps over the lazy dog")
>self.disentangle(0x40, tri, self.indent+1)
>IMO this is clearer, and even shorter!
What was your opinion on "where" as a lambda replacement? i.e.
foo = bar(callback1, callback2) where:
print "hello, "
I suspect that you like the define-first approach because of your tendency
to ask questions first and read later. That is, you want to know what
callback1 and callback2 are before you see them passed to
something. However, other people seem to like to have the context first,
then fill in the details of each callback later.
Interestingly, this syntax also works to do decoration, though it's not a
syntax that was ever proposed for that. e.g.:
foo = classmethod(foo) where:
foo = property(get_foo,set_foo) where:
I don't mind @decorators, of course, but maybe they wouldn't be needed here.
>If we apply this to the anonymous block problem, we may end up finding
>lambda the ultimate compromise -- like a gentleman in the back of my
>talk last week at baypiggies observed (unfortunately I don't know his
>--Guido van Rossum (home page: http://www.python.org/~guido/)
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