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| -rw-r--r-- | Doc/library/itertools.rst | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/Doc/library/itertools.rst b/Doc/library/itertools.rst index 3e5a673898..3c94c4b35d 100644 --- a/Doc/library/itertools.rst +++ b/Doc/library/itertools.rst @@ -563,6 +563,9 @@ loops that truncate the stream. for prod in result: yield tuple(prod) + Before :func:`product` runs, it completely consumes the input iterables, + keeping pools of values in memory to generate the products. Accordingly, + it only useful with finite inputs. .. function:: repeat(object[, times]) |