diff options
Diffstat (limited to 'Doc')
| -rw-r--r-- | Doc/library/functools.rst | 12 | ||||
| -rw-r--r-- | Doc/library/itertools.rst | 3 |
2 files changed, 15 insertions, 0 deletions
diff --git a/Doc/library/functools.rst b/Doc/library/functools.rst index d8fcf0f..3c946e3 100644 --- a/Doc/library/functools.rst +++ b/Doc/library/functools.rst @@ -185,6 +185,18 @@ The :mod:`functools` module defines the following functions: a default when the sequence is empty. If *initializer* is not given and *sequence* contains only one item, the first item is returned. + Equivalent to:: + + def reduce(function, iterable, initializer=None): + it = iter(iterable) + if initializer is None: + value = next(it) + else: + value = initializer + for element in it: + value = function(value, element) + return value + .. function:: update_wrapper(wrapper, wrapped, assigned=WRAPPER_ASSIGNMENTS, updated=WRAPPER_UPDATES) diff --git a/Doc/library/itertools.rst b/Doc/library/itertools.rst index 25f34bf..0156c05 100644 --- a/Doc/library/itertools.rst +++ b/Doc/library/itertools.rst @@ -135,6 +135,9 @@ loops that truncate the stream. '0.93', '0.25', '0.71', '0.79', '0.63', '0.88', '0.39', '0.91', '0.32', '0.83', '0.54', '0.95', '0.20', '0.60', '0.91', '0.30', '0.80', '0.60'] + See :func:`functools.reduce` for a similar function that returns only the + final accumulated value. + .. versionadded:: 3.2 .. versionchanged:: 3.3 |