On Mon, Oct 17, 2016 at 7:50 PM, Random832 <random832@fastmail.com> wrote:
On Mon, Oct 17, 2016, at 22:17, David Mertz wrote:
> > [*range(x) for x in range(4)]
> As Paul or someone pointed out, that's a fairly odd thing to do.

I agree with the specific example of it being an odd thing to do with
range, it was just an attempt to illustrate with a concrete example.

It's also easy to construct examples where the hypothetical * syntax can't handle a requirement.  E.g. flatten() with levels>1 (yes, of course you can find some way to nest more loops or more comprehensions-within-comprehensions to make it work in some way that still uses the * by force).

I feel like I should be honest about something else - I'm always a
little bit confused by the ordering for comprehensions involving
multiple clauses.

Me too! I get the order of nested loops in comprehensions wrong about 25% of the time.  Then it's a NameError, and I fix it.

This is a lot of why I like a utility function like `flatten()` that is pretty much self-documenting.  Perhaps a couple other itertools helpers would be nice.

Keeping medicines from the bloodstreams of the sick; food
from the bellies of the hungry; books from the hands of the
uneducated; technology from the underdeveloped; and putting
advocates of freedom in prisons.  Intellectual property is
to the 21st century what the slave trade was to the 16th.