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| author | Raymond Hettinger <python@rcn.com> | 2003-12-06 16:23:06 (GMT) |
|---|---|---|
| committer | Raymond Hettinger <python@rcn.com> | 2003-12-06 16:23:06 (GMT) |
| commit | d25c1c635164daa5c300342ac99c0810fd9b575c (patch) | |
| tree | df412ba3ffaa8fee35e2e12f96aab0beecdaaec0 /Misc | |
| parent | b8d5f245b7077d869121835ed72656ac14962ef0 (diff) | |
| download | cpython-d25c1c635164daa5c300342ac99c0810fd9b575c.zip cpython-d25c1c635164daa5c300342ac99c0810fd9b575c.tar.gz cpython-d25c1c635164daa5c300342ac99c0810fd9b575c.tar.bz2 | |
Implement itertools.groupby()
Original idea by Guido van Rossum.
Idea for skipable inner iterators by Raymond Hettinger.
Idea for argument order and identity function default by Alex Martelli.
Implementation by Hye-Shik Chang (with tweaks by Raymond Hettinger).
Diffstat (limited to 'Misc')
| -rw-r--r-- | Misc/NEWS | 5 |
1 files changed, 5 insertions, 0 deletions
@@ -164,6 +164,11 @@ Extension modules SF bug #812202). Generators that do not define genrandbits() now issue a warning when randrange() is called with a range that large. +- itertools has a new function, groupby() for aggregating iterables + into groups sharing the same key (as determined by a key function). + It offers some of functionality of SQL's groupby keyword and of + the Unix uniq filter. + - itertools now has a new function, tee() which produces two independent iterators from a single iterable. |