diff options
| author | Raymond Hettinger <python@rcn.com> | 2010-08-07 05:36:53 (GMT) |
|---|---|---|
| committer | Raymond Hettinger <python@rcn.com> | 2010-08-07 05:36:53 (GMT) |
| commit | 08d01eedeff8db39bcc081aebed0bfd1ae54e9e0 (patch) | |
| tree | 1009941ccd93dc51e89714f0e5a76a1b8522cd33 /Doc/library/itertools.rst | |
| parent | e9499aef0a28fda0d3c4bdc0eb9ae220390299ac (diff) | |
| download | cpython-08d01eedeff8db39bcc081aebed0bfd1ae54e9e0.zip cpython-08d01eedeff8db39bcc081aebed0bfd1ae54e9e0.tar.gz cpython-08d01eedeff8db39bcc081aebed0bfd1ae54e9e0.tar.bz2 | |
Add partition recipe to itertools docs.
Diffstat (limited to 'Doc/library/itertools.rst')
| -rw-r--r-- | Doc/library/itertools.rst | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/Doc/library/itertools.rst b/Doc/library/itertools.rst index 8037bfe..cadd0f3 100644 --- a/Doc/library/itertools.rst +++ b/Doc/library/itertools.rst @@ -653,6 +653,12 @@ which incur interpreter overhead. pending -= 1 nexts = cycle(islice(nexts, pending)) + def partition(pred, iterable): + 'Use a predicate to partition entries into false entries and true entries' + # partition(is_odd, range(10)) --> 0 2 4 6 8 and 1 3 5 7 9 + t1, t2 = tee(iterable) + return filterfalse(pred, t1), filter(pred, t2) + def powerset(iterable): "powerset([1,2,3]) --> () (1,) (2,) (3,) (1,2) (1,3) (2,3) (1,2,3)" s = list(iterable) |