May be the first thing which I should do is to improve my English:) My main point was that in many cases

(in my experience) it is a waste of memory to store entire list for star variable (*b) instead of some kind

of iterator or deferred evaluation.

How do you defer evaluating the second and subsequent items if you
evaluate the final two? Given:

def gen():
yield 999
for i in range(100):
yield random.random()
yield 999
yield 999

then

a, ?*b, c, d = gen()

If I can not copy at Python level, I can 'tee' when 'star_pos' is reached.

In my usual practice, the main use that I encounter when see an assignment to a star variable is as a storage

which is used only if the other vars match some criterion.

With kind regards, -gdg