generator slides review
Peter Otten
__peter__ at web.de
Sun Feb 2 07:47:06 EST 2014
andrea crotti wrote:
> 2014-02-01 Miki Tebeka <miki.tebeka at gmail.com>:
>>
>> My 2 cents:
>> slide 21:
>> from itertools import count, ifilterfalse
>>
>> def divided_by(p):
>> return lambda n: n % p == 0
>>
>> def primes():
>> nums = count(2)
>> while True:
>> p = next(nums)
>> yield p
>> nums = ifilterfalse(divided_by(p), nums)
>>
>
> Thank you that's nicer,
It may be nice, but is probably less efficient because of the lambda
function calls that replace the if expression in your
> def exclude_multiples(n, ints):
> for i in ints:
> if (i % n) != 0:
> yield i
> but ifiilterfalse is not in Python 3 (could
> use filter of course).
ifilterfalse() isn't gone in Python3, it just was renamed to filterfalse().
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