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Diffstat (limited to 'Doc/glossary.rst')
| -rw-r--r-- | Doc/glossary.rst | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/Doc/glossary.rst b/Doc/glossary.rst index 8be2e62..92877bd 100644 --- a/Doc/glossary.rst +++ b/Doc/glossary.rst @@ -444,12 +444,13 @@ Glossary A number of tools in Python accept key functions to control how elements are ordered or grouped. They include :func:`min`, :func:`max`, - :func:`sorted`, :meth:`list.sort`, :func:`heapq.nsmallest`, - :func:`heapq.nlargest`, and :func:`itertools.groupby`. + :func:`sorted`, :meth:`list.sort`, :func:`heapq.merge`, + :func:`heapq.nsmallest`, :func:`heapq.nlargest`, and + :func:`itertools.groupby`. There are several ways to create a key function. For example. the :meth:`str.lower` method can serve as a key function for case insensitive - sorts. Alternatively, an ad-hoc key function can be built from a + sorts. Alternatively, a key function can be built from a :keyword:`lambda` expression such as ``lambda r: (r[0], r[2])``. Also, the :mod:`operator` module provides three key function constructors: :func:`~operator.attrgetter`, :func:`~operator.itemgetter`, and |