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| author | Christian Heimes <christian@cheimes.de> | 2008-01-31 14:31:45 (GMT) |
|---|---|---|
| committer | Christian Heimes <christian@cheimes.de> | 2008-01-31 14:31:45 (GMT) |
| commit | 7b3ce6a17ea70e2acec46122e134097ce03d044a (patch) | |
| tree | 51c11d64bc07786b0e1f9d5a8aaf8336a62a8d66 /Doc/library/itertools.rst | |
| parent | 4b8db419c278215ac1c79f4aac2b1453b13e8c83 (diff) | |
| download | cpython-7b3ce6a17ea70e2acec46122e134097ce03d044a.zip cpython-7b3ce6a17ea70e2acec46122e134097ce03d044a.tar.gz cpython-7b3ce6a17ea70e2acec46122e134097ce03d044a.tar.bz2 | |
Merged revisions 60441-60474 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk
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r60441 | christian.heimes | 2008-01-30 12:46:00 +0100 (Wed, 30 Jan 2008) | 1 line
Removed unused var
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r60448 | christian.heimes | 2008-01-30 18:21:22 +0100 (Wed, 30 Jan 2008) | 1 line
Fixed some references leaks in sys.
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r60450 | christian.heimes | 2008-01-30 19:58:29 +0100 (Wed, 30 Jan 2008) | 1 line
The previous change was causing a segfault after multiple calls to Py_Initialize() and Py_Finalize().
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r60463 | raymond.hettinger | 2008-01-30 23:17:31 +0100 (Wed, 30 Jan 2008) | 1 line
Update itertool recipes
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r60464 | christian.heimes | 2008-01-30 23:54:18 +0100 (Wed, 30 Jan 2008) | 1 line
Bug #1234: Fixed semaphore errors on AIX 5.2
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r60469 | raymond.hettinger | 2008-01-31 02:38:15 +0100 (Thu, 31 Jan 2008) | 6 lines
Fix defect in __ixor__ which would get the wrong
answer if the input iterable had a duplicate element
(two calls to toggle() reverse each other). Borrow
the correct code from sets.py.
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r60470 | raymond.hettinger | 2008-01-31 02:42:11 +0100 (Thu, 31 Jan 2008) | 1 line
Missing return
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r60471 | jeffrey.yasskin | 2008-01-31 08:44:11 +0100 (Thu, 31 Jan 2008) | 4 lines
Added more documentation on how mixed-mode arithmetic should be implemented. I
also noticed and fixed a bug in Rational's forward operators (they were
claiming all instances of numbers.Rational instead of just the concrete types).
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Diffstat (limited to 'Doc/library/itertools.rst')
| -rw-r--r-- | Doc/library/itertools.rst | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/Doc/library/itertools.rst b/Doc/library/itertools.rst index a088683..58ed4fa 100644 --- a/Doc/library/itertools.rst +++ b/Doc/library/itertools.rst @@ -511,5 +511,16 @@ which incur interpreter overhead. :: "grouper(3, 'abcdefg', 'x') --> ('a','b','c'), ('d','e','f'), ('g','x','x')" return izip(*[chain(iterable, repeat(padvalue, n-1))]*n) - + def roundrobin(*iterables): + "roundrobin('abc', 'd', 'ef') --> 'a', 'd', 'e', 'b', 'f', 'c'" + # Recipe contributed by George Sakkis + pending = len(iterables) + nexts = cycle(iter(it).next for it in iterables) + while pending: + try: + for next in nexts: + yield next() + except StopIteration: + pending -= 1 + nexts = cycle(islice(nexts, pending)) |