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33 Commits

Author SHA1 Message Date
Raymond Hettinger b2594050ea Added optional None arguments to itertools.islice(). 2004-12-05 09:25:51 +00:00
Raymond Hettinger 4533f1fb7f Improve three recipes in the itertools docs. 2004-09-23 07:27:39 +00:00
Raymond Hettinger 88e8e34ab0 Style nit. 2004-07-11 13:20:11 +00:00
Raymond Hettinger 2e6694086f Minor wording and spacing nits. 2004-06-12 07:59:40 +00:00
Raymond Hettinger d7911a3317 Minor documentation nits. 2004-05-01 08:31:36 +00:00
Raymond Hettinger 734fb5724f Add a Guido inspired example for groupby(). 2004-01-20 20:04:40 +00:00
Andrew M. Kuchling 3435820842 Fix typo 2003-12-18 13:28:35 +00:00
Raymond Hettinger 64958a15d7 Guido grants a Christmas wish: 
sorted() becomes a regular function instead of a classmethod.
 2003-12-17 20:43:33 +00:00
Raymond Hettinger ff294fea40 SF patch #855195: fix typos 
(Contributed by George Yoshida.)
 2003-12-07 13:00:25 +00:00
Andrew M. Kuchling db7dcffa27 Edit description a bit 2003-12-06 22:29:43 +00:00
Raymond Hettinger d25c1c6351 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).
 2003-12-06 16:23:06 +00:00
Raymond Hettinger ad983e79d6 Improve the implementation of itertools.tee(). 
Formerly, underlying queue was implemented in terms of two lists.  The
new queue is a series of singly-linked fixed length lists.

The new implementation runs much faster, supports multi-way tees, and
allows tees of tees without additional memory costs.

The root ideas for this structure were contributed by Andrew Koenig
and Guido van Rossum.
 2003-11-12 14:32:26 +00:00
Raymond Hettinger d591f666de Replace the window() example with pairwise() which demonstrates tee(). 2003-10-26 15:34:50 +00:00
Raymond Hettinger 6a5b027742 Added itertools.tee() 
It works like the pure python verion except:
* it stops storing data after of the iterators gets deallocated
* the data queue is implemented with two stacks instead of one dictionary.
 2003-10-24 08:45:23 +00:00
Guido van Rossum 0c9a318d64 Use 'predicate = bool' as the default predicate for ifilter[false]. 2003-10-20 17:01:07 +00:00
Raymond Hettinger dbe3d280e7 Adopt Christian Stork's suggested argument order for the logic quantifiers. 
Adopt Jeremy Fincher's suggested function name, "any", instead of "some".
 2003-10-05 16:47:36 +00:00
Raymond Hettinger 7e43110f34 SF 810242. Fix doubled word errors. 2003-09-22 15:00:55 +00:00
Raymond Hettinger a098b33c93 Add an example to address a common question of how to split iterators. 2003-09-08 23:58:40 +00:00
Raymond Hettinger 9e3864190c Make the derived tools amendable to cut and paste. 2003-08-25 05:06:09 +00:00
Raymond Hettinger b5a420883c Modified itertools.izip() to match the behavior of __builtin__.zip() 
which can now take zero arguments.
 2003-08-08 05:10:41 +00:00
Raymond Hettinger c7d7766fda Improve docs: 
* Simplify the pure python examples
* Add a quantify() example
 2003-08-08 02:40:28 +00:00
Raymond Hettinger 88821f7c20 Important usability fix in itertools documentation. 2003-07-22 06:33:13 +00:00
Raymond Hettinger 3567a876c7 Add take() to examples. Tighten the islice() example 2003-06-28 05:44:36 +00:00
Raymond Hettinger befa37dd05 Minor updates: 
* Updated comment on design of imap()
* Added untraversed object in izip() structure
* Replaced the pairwise() example with a more general window() example
 2003-06-18 19:25:37 +00:00
Raymond Hettinger 341deb74e7 The previous made the stop argument optional. 
It is better to be explicit and just allow stop to be None.
 2003-05-02 19:44:20 +00:00
Raymond Hettinger 14ef54cd83 SF bug #730685: itertools.islice stop argument is not optional 
* itertools.islice() stop argument did not perform as documented.
* beefed-up test suite
 2003-05-02 19:04:37 +00:00
Raymond Hettinger 863983e8e5 Add comment on performance. 
Fix missing right parenthesis.
Add three examples.
 2003-04-23 00:09:42 +00:00
Raymond Hettinger 61fe64d5de User requested changes to the itertools module. 
Subsumed times() into repeat().
Added cycle() and chain().
 2003-02-23 04:40:07 +00:00
Raymond Hettinger 1b18ba49ab Markup and nits. 2003-02-21 01:45:34 +00:00
Michael W. Hudson eb189934ce Fix so it compiles at least. 
"make lib" takes a while, doesn't it?
 2003-02-11 14:24:13 +00:00
Raymond Hettinger 60eca9331a C Code: 
* Removed the ifilter flag wart by splitting it into two simpler functions.
* Fixed comment tabbing in C code.
* Factored module start-up code into a loop.

Documentation:
* Re-wrote introduction.
* Addede examples for quantifiers.
* Simplified python equivalent for islice().
* Documented split of ifilter().

Sets.py:
* Replace old ifilter() usage with new.
 2003-02-09 06:40:58 +00:00
Raymond Hettinger 2012f174ea SF bug #681003: itertools issues 
* Fixed typo in exception message for times()
* Filled in missing times_traverse()
* Document reasons that imap() did not adopt a None fill-in feature
* Document that count(sys.maxint) will wrap-around on overflow
* Add overflow test to islice()
* Check that starmap()'s argument returns a tuple
* Verify that imap()'s tuple re-use is safe
* Make a similar tuple re-use (with safety check) for izip()
 2003-02-07 05:32:58 +00:00
Raymond Hettinger 96ef8115dd Move itertools module from the sandbox and into production. 2003-02-01 00:10:11 +00:00