On Sep 28, 2013, at 12:18 PM, Matthew Rocklin <notifications@github.com> wrote:

> In toolz/itertoolz/recipes.py:
> 
> > @@ -15,4 +15,14 @@ def countby(func, seq):
> >      See Also:
> >          groupby
> >      """
> > -    return frequencies(imap(func, seq))
> > +    return frequencies(map(func, seq))
> > +
> > +
> > +def mapcat(f, seqs):
> Also note that these are all imported into the top-level interface. Users don't see the distinction. Developers do.
> 
> 
Good to know.

> I think there is a cost to adding functions into core.py. I'd like to eventually transition a lot of the functions in core out of core. For example the first, last, second family takes up a lot of mind-space despite largely being partial evaluations of nth
> 
> 

Maybe a comment in `core.py` to the effect of what should and should not go in there, then.

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