[Python-iterators] While we're at it...

[Thomas Wouters]

On Mon, Jul 02, 2001 at 11:03:18AM +1000, Delaney, Timothy wrote:
> > >Of course, an iterator map would be useful:
> > >
> > >def iter_map(f, seq):
> > >    for o in seq:
> > >        yield f(o)
> > 
> > This is a generator, not just an iterator.

> def iter_map (f, seq):
> 
>     def iter_map_generator (f=f, seq=seq):
>         for o in seq:
>             yield f(o)

>     return iter_map_generator()

While this makes a technical difference, the result is exactly the same.
It's just slower :-) The first example (iter_map, the generator) shows
exactly why 'yield' isn't magic and a generator should be defined using
'def': all you need is 'yield' instead of 'result.append()' and you
magically do the right thing :-)

-- 
Thomas Wouters <thomas at xs4all.net>

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