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Re: should I transfer 'iterators' between functions?

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On 1/25/14 1:37 AM, seaspeak@gmail.com wrote:
> take the following as an example, which could work well.
> But my concern is, will list 'l' be deconstructed after function return? and then iterator point to nowhere?
>
> def test():
>      l = [1, 2, 3, 4, 5, 6, 7, 8]
>      return iter(l)
> def main():
>      for i in test():
>          print(i)
>
>

One more thing: there's no need to call iter() explicitly here.  Much 
more common than returning an iterator from a function is to return an 
iterable.  Your code will work exactly the same if you just remove the 
iter() call:

     def test():
         l = [1, 2, 3, 4, 5, 6, 7, 8]
         return l
     def main():
         for i in test():
             print(i)


-- 
Ned Batchelder, http://nedbatchelder.com

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should I transfer 'iterators' between functions? seaspeak@gmail.com - 2014-01-24 22:37 -0800
  Re: should I transfer 'iterators' between functions? Chris Angelico <rosuav@gmail.com> - 2014-01-25 17:43 +1100
  Re: should I transfer 'iterators' between functions? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-01-25 06:45 +0000
  Re: should I transfer 'iterators' between functions? Ned Batchelder <ned@nedbatchelder.com> - 2014-01-25 07:55 -0500
  Re: should I transfer 'iterators' between functions? Ned Batchelder <ned@nedbatchelder.com> - 2014-01-25 07:56 -0500
  Re: should I transfer 'iterators' between functions? Peter Otten <__peter__@web.de> - 2014-01-25 14:32 +0100

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