islice ==> [::]

[bearophileHUGS]

I find itertools.islice() useful, so for Python 3.x I may like to see
it removed from the itertools module, and the normal slicing syntax
[::] extended to work with generators/iterators too.

from itertools import islice
primes = (x for x in xrange(1,999) if all(x % y for y in xrange(2,
x)))
print list(islice(primes, 0, 20))
==>
print list(primes[:20])

Bye,
bearophile

[Raymond Hettinger]

[castiro]

Slice literals are a logical next step, precedented by raw strings and
bytes. slice= islice is too, precedented by range= xrange.

Looking closely at the [::] notation, I think it can easily be
confused with an open box of fleas. IMO, the one unequivocal,
explicit way of checking for lice is itertools.is_lice().
Raymond

_ ~
@ @
\_/

[George Sakkis]

On Mar 7, 7:49 am, [e-mail] wrote:

I find itertools.islice() useful, so for Python 3.x I may like to see
it removed from the itertools module, and the normal slicing syntax
[::] extended to work with generators/iterators too.

from itertools import islice
primes = (x for x in xrange(1,999) if all(x % y for y in xrange(2,
x)))
print list(islice(primes, 0, 20))
==>
print list(primes[:20])

Bye,
bearophile

I had posted some time ago an OO wrapper of itertools; slice notation
for islice was one motivation: http://aspn.activestate.com/ASPN/Coo.../Recipe/498272

George

[bearophileHUGS]

George Sakkis:

I had posted some time ago an OO wrapper of itertools; slice notation
for islice was one motivation:http://aspn.activestate.com/ASPN/Coo.../Recipe/498272

I think I did see that, but later I forgot of it. It looks nice.
Thank you,
bearophile