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Clarify the table entries for combinatorics.

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Raymond Hettinger
2009-04-10 04:30:08 +00:00
parent 7d7133d581
commit fbb64fcc61
1 changed files with 11 additions and 7 deletions
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18
Doc/library/itertools.rst
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@@ -60,13 +60,17 @@ 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: