PEP 289: Generator Expressions (please comment)

[Just]

In article <871xt1qvwb.fsf at pobox.com>, jjl at pobox.com (John J. Lee) 
wrote:

> "Emile van Sebille" <emile at fenx.com> writes:
> [...]
> > What do you get from:
> >     type(x*x for x in roots)
> [...]
> 
> <type 'function'>?

<type 'generator'> actually:

>>> def foo(): yield 1
... 
>>> type(foo)
<type 'function'>
>>> type(foo())
<type 'generator'>
>>> 

Just