Mark Lawrence於 2012年7月31日星期二UTC+8下午3時15分32秒寫道：
> On 31/07/2012 02:20, Dennis Lee Bieber wrote:For each item in the known list that passes the required conditional test,
> > On Mon, 30 Jul 2012 22:56:48 +0000, Dan Stromberg <drsali...@gmail.com>
> > declaimed the following in gmane.comp.python.general:
> >> Sigh, and I'm also not keen on multi-line list comprehensions, specifically
> >> because I think they tend to make less readable code. It also becomes a
> >> mess when you need to insert print statements to get some visibility into
> >> what's going on.
> > Cleanly splitting the list-comp by
> > [ result-computation
> > for-item-selection-clause
> > if-filter-clause ]
> > isn't that unreadable... But anyone doing
> > [ result-
> > -computation for-item-
> > -selection-clause if-
> > -filter-
> > -clause ]
> > should be pecked to death by a dead parrot.
> Any particular species?
> Mark Lawrence.
then use the item to perform the tasks desired as instructed.
It is not necessary that a new list has to be constructed in the tasks.
A method which can produce a new object always involves some memory management.
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