[Python-Dev] PEP 340 - possible new name for block-statement
aahz at pythoncraft.com
Fri Apr 29 18:38:54 CEST 2005
On Fri, Apr 29, 2005, Nick Coghlan wrote:
> If you want to emphasise the similarity, the following syntax and
> explanation is something that occurred to me during lunch today:
We don't want to emphasize the similarity.
> Python offers two variants on the basic iterative loop.
> "for NAME from EXPR:" enforces finalisation of the iterator. At loop
> completion, a well-behaved iterator is always completely exhausted. This
> form supports block management operations, that ensure timely release of
> resources such as locks or file handles.
> If the values being iterated over are not required, then the statement
> may be simplified to "for EXPR:".
> "for NAME in EXPR:" skips the finalisation step. At loop completion, a
> well-behaved iterator may still contain additional values. This form allows
> an iterator to be consumed in stages.
-1 -- the Zen of Python implies that we should be able to tell which
construct we're using at the beginning of the line.
Aahz (aahz at pythoncraft.com) <*> http://www.pythoncraft.com/
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