simultaneous assignment

[John Salerno]

Steve R. Hastings wrote:

> We could also use "generator expressions", available only in
> Python 2.4 and newer.
> 
> A list comprehension always builds a list.  A generator expression can
> return values one at a time.
> 
> [v for v in seq if v]  # builds a list and returns it
> (v for v in seq if v)  # returns a generator object

Woah, interesting. Somehow I don't think I knew that generators could 
exist outside of generator functions (using yield)! I was wondering why 
the second one above worked without brackets. :)