PEP-0315--Enhanced While Loop: An idea for an alternative syntax
Andrew Clover
and-google at doxdesk.com
Wed Feb 18 11:39:32 EST 2004
Andrew Koenig <ark at acm.org> wrote:
> while:
> x = foo()
> and while x != 0:
> bar(x)
This is the best syntax I've seen suggested so far. Tentatively +1
(shouldn't cause any parser difficulties should it?); the lack of new
keywords is a plus too.
> 'or while' -
> while True:
> if <condition 1>:
> <statements 1>
> elif <condition 2>:
> <statements 2>
Shouldn't this logically be 'else while' then? 'or while' would imply to
me that there was fall-through from <statements 1> to <statements 2>. I
suppose 'else while' could cause confusion with Python's while...else
construct though.
Not sure this would see a lot of use; I can't think of the last time I used
a structure like that.
Here's another construct suggested by 'and while':
if x is not None:
x.connect()
q= x.fetch()
and if len(q)>=1:
a= q[0]
else:
raise Foo() # one of the previous conditions was False
--
Andrew Clover
mailto:and at doxdesk.com
http://www.doxdesk.com/
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