[Python-ideas] Allow filter(items)

[Shane Green]

+1.  

Isn’t None’s meaning in this context basically the identity function?  If so, then passing the iterable to filter directly seems to make more sense.


On Aug 5, 2013, at 12:46 AM, Peter Otten <__peter__ at web.de> wrote:

> filter(items)
> 
> looks much cleaner than
> 
> filter(None, items)
> 
> and is easy to understand. Fewer people would use alternative spellings like 
> 
> filter(bool, items) 
> filter(len, items)
> filter(lambda s: s != "", strings)
> 
> The signature change may lead you to spell
> 
> filter(predicate, items) # correct
> 
> as 
> 
> filter(items, predicate) # wrong
> 
> but this is a noisy error. I think the advantage of making the magic None 
> redundant outweighs this potential pitfall.
> 
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