Generator vs functools.partial?

John O'Hagan research at johnohagan.com
Thu Jun 21 16:56:20 CEST 2012


On Thu, 21 Jun 2012 14:20:23 +0200
Thomas Rachel
<nutznetz-0c1b6768-bfa9-48d5-a470-7603bd3aa915 at spamschutz.glglgl.de> wrote:

> Am 21.06.2012 13:25 schrieb John O'Hagan:
> 
> > But what about a generator?
> 
> Yes, but...
> 
> > def some_func():
> >      arg = big_calculation()
> >      while 1:
> >          i = yield
> >          (do_something with arg and i)
> >
> > some_gen = some_func()
> > some_gen.send(None)
> > for i in lots_of_items:
> >      some_gen.send(i)
> 
> rather
> 
> def some_func(it):
>      arg = big_calculation()
>      for i in it:
>          do_something(arg, i)
> 
> some_func(lots_of_items)
> 
Ah yes, this demonstrates that my examples were too simple to show what I'm
trying to do. In my real code, several functions take the elements from an
iterator, so I can't pass the whole iterator to each one. I have a feeling there
is some bad factoring in my real code which will disappear if I manage to
provide a clear example, which I'll now endevour to do. Thanks for the reply.

--

John



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