diff options
| author | Raymond Hettinger <python@rcn.com> | 2009-04-10 04:29:23 (GMT) |
|---|---|---|
| committer | Raymond Hettinger <python@rcn.com> | 2009-04-10 04:29:23 (GMT) |
| commit | d06358fe3e74d80f64416cd274d58aa552aa373a (patch) | |
| tree | 9bd94b5b494796bd6944abee3340d742c25b28fd | |
| parent | b9f1a0c2f601fad55bfc6b4f995a1739fbc957d9 (diff) | |
| download | cpython-d06358fe3e74d80f64416cd274d58aa552aa373a.zip cpython-d06358fe3e74d80f64416cd274d58aa552aa373a.tar.gz cpython-d06358fe3e74d80f64416cd274d58aa552aa373a.tar.bz2 | |
Clarify the table entries for combinatorics.
| -rw-r--r-- | Doc/library/itertools.rst | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/Doc/library/itertools.rst b/Doc/library/itertools.rst index c0a1305..98c5216 100644 --- a/Doc/library/itertools.rst +++ b/Doc/library/itertools.rst @@ -65,13 +65,17 @@ operator can be mapped across two vectors to form an efficient dot-product: **Combinatoric generators:** - ===================================== ==================== ================================================= - Iterator Arguments Results - ===================================== ==================== ================================================= - :func:`product` p, q, ... [repeat=1] cartesian product - :func:`permutations` p[, r] r-length permutations (without repeated elements) - :func:`combinations` p[, r] r-length combinations (sorted and no repeats) - ===================================== ==================== ================================================= + ============================================== ==================== ============================================================= + Iterator Arguments Results + ============================================== ==================== ============================================================= + :func:`product` p, q, ... [repeat=1] cartesian product, equivalent to a nested for-loop + :func:`permutations` p[, r] r-length tuples, all possible orderings, no repeated elements + :func:`combinations` p[, r] r-length tuples, in sorted order, no repeated elements + | + ``product('ABCD', repeat=2)`` ``AA AB AC AD BA BB BC BD CA CB CC CD DA DB DC DD`` + ``permutations('ABCD', 2)`` ``AB AC AD BA BC BD CA CB CD DA DB DC`` + ``combinations('ABCD', 2)`` ``AB AC AD BC BD CD`` + ============================================== ==================== ============================================================= .. _itertools-functions: |