
On Jul 19, 2016 10:51 AM, "Serhiy Storchaka" <storchaka@gmail.com> wrote:
On 18.07.16 01:21, Wes Turner wrote:
There are a number of generic implementations of these sequence
algorithms:
* http://toolz.readthedocs.io/en/latest/api.html#itertoolz * https://github.com/kachayev/fn.py#itertools-recipes * http://funcy.readthedocs.io/en/stable/seqs.html * http://docs.python.org/2/reference/expressions.html#slicings * https://docs.python.org/2/library/itertools.html#itertools.islice * https://docs.python.org/3/library/itertools.html#itertools.islice
Aren't all these implementations works with iterables and iterators?
On Jul 17, 2016 3:23 PM, "Serhiy Storchaka" <storchaka@gmail.com <mailto:storchaka@gmail.com>> wrote:
Maybe it's time to add a new module for sequence-specific functions
(seqtools?). It should contain at least two classes or fabric functions:
1. A view that represents a sliced subsequence. Lazy equivalent of
seq[start:end:step]. This feature is implemented in third-party module dataview [1].
islice?
The result of itertools.islice() is not a sequence.
2. A view that represents a linear sequence as 2D array. Iterating this view emits non-intersecting chunks of the sequence. For example it can be used for representing the bytes object as a sequence of 1-byte bytes objects (as in 2.x), a generalized alternative to iterbytes() from PEP 467 [2].
partition?
http://toolz.readthedocs.io/en/latest/api.html#toolz.itertoolz.partition _all
toolz.itertoolz.partition() is just a generator.
so you're looking for something like strided memoryviews for nonsequential access over sequences/iterables which are sequential? sort of like a bitmask? https://docs.python.org/3/library/stdtypes.html#memoryview
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