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59 commits

Author SHA1 Message Date
Raymond Hettinger
08ff6822cc Handle the repeat keyword argument for itertools.product(). 2008-02-29 02:21:48 +00:00
Raymond Hettinger
b4cbc98c39 Add alternate constructor for itertools.chain(). 2008-02-28 22:46:41 +00:00
Raymond Hettinger
05bf6338b8 Have itertools.chain() consume its inputs lazily instead of building a tuple of iterators at the outset. 2008-02-28 22:30:42 +00:00
Raymond Hettinger
2ab0552b5e Larger test range 2008-02-27 01:08:30 +00:00
Raymond Hettinger
93e804da9c Add itertools.combinations(). 2008-02-26 23:40:50 +00:00
Raymond Hettinger
9d63837e9b Make sure the itertools filter functions give the same performance for func=bool as func=None. 2008-02-25 22:42:32 +00:00
Raymond Hettinger
73d7963242 Improve the implementation of itertools.product() 
* Fix-up issues pointed-out by Neal Norwitz.
* Add extensive comments.
* The lz->result variable is now a tuple instead of a list.
* Use fast macro getitem/setitem calls so most code is in-line.
* Re-use the result tuple if available (modify in-place instead of copy).
 2008-02-23 02:20:41 +00:00
Raymond Hettinger
50986cc45b First draft for itertools.product(). Docs and other updates forthcoming. 2008-02-22 03:16:42 +00:00
Raymond Hettinger
473170908e Make starmap() match its pure python definition and accept any itertable input (not just tuples). 2008-01-17 03:02:14 +00:00
Raymond Hettinger
3a0de08d54 Fix test of count.__repr__() to ignore the 'L' if the count is a long 2007-10-12 17:53:11 +00:00
Raymond Hettinger
50e90e265f itertools.count() no longer limited to sys.maxint. 2007-10-04 00:20:27 +00:00
Kristján Valur Jónsson
170eee9d6a Fix those parts in the testsuite that assumed that sys.maxint would cause overflow on x64. Now the testsuite is well behaved on that platform. 2007-05-03 20:09:56 +00:00
Tim Peters
ea5962f86e Whitespace normalization. 2007-03-12 18:07:52 +00:00
Raymond Hettinger
d36862cf78 Add itertools.izip_longest(). 2007-02-21 05:20:38 +00:00
Raymond Hettinger
6d121f168c Do not let overflows in enumerate() and count() pass silently. 2007-02-08 00:07:32 +00:00
Georg Brandl
b84c13792d Bug #1486663: don't reject keyword arguments for subclasses of builtin 
types.
 2007-01-21 10:28:43 +00:00
Jack Diederich
36234e8f66 * regression bug, count_next was coercing a Py_ssize_t to an unsigned Py_size_t 
which breaks negative counts
* added test for negative numbers
will backport to 2.5.1
 2006-09-21 17:50:26 +00:00
Neal Norwitz
69e8897505 Bug #1550714: fix SystemError from itertools.tee on negative value for n. 
Needs backport to 2.5.1 and earlier.
 2006-09-02 02:58:13 +00:00
Armin Rigo
a3f092751a ("Forward-port" of r46506) 
Remove various dependencies on dictionary order in the standard library
tests, and one (clearly an oversight, potentially critical) in the
standard library itself - base64.py.

Remaining open issues:
 * test_extcall is an output test, messy to make robust
 * tarfile.py has a potential bug here, but I'm not familiar
   enough with this code.  Filed in as SF bug #1496501.
 * urllib2.HTTPPasswordMgr() returns a random result if there is more
   than one matching root path.  I'm asking python-dev for
   clarification...
 2006-05-28 19:13:17 +00:00
Raymond Hettinger
6b27cda643 Convert iterator __len__() methods to a private API. 2005-09-24 21:23:05 +00:00
Raymond Hettinger
fdf3bd6630 SF patch #1171417: bug fix for islice() in docs 2005-03-27 20:11:44 +00:00
Raymond Hettinger
f77d0334f3 Revised the itertools quantifier recipes to match the performance of the 
new builtins.
 2005-03-11 22:17:30 +00:00
Raymond Hettinger
b2594050ea Added optional None arguments to itertools.islice(). 2004-12-05 09:25:51 +00:00
Raymond Hettinger
a9f6092904 Fix and test weak referencing of itertools.tee objects. 2004-10-17 16:40:14 +00:00
Raymond Hettinger
ff5dc0ee77 Improve test coverage. 2004-09-29 11:40:50 +00:00
Raymond Hettinger
4cda01e260 * Increase test coverage. 
* Have groupby() be careful about decreffing structure members.
 2004-09-28 04:45:28 +00:00
Raymond Hettinger
ffdb8bb99c Use floor division operator. 2004-09-27 15:29:05 +00:00
Raymond Hettinger
4533f1fb7f Improve three recipes in the itertools docs. 2004-09-23 07:27:39 +00:00
Tim Peters
beb7c0c434 test_sf_950057's gen1() used an assert statement, which caused the test 
to fail when running with -O.  Changed to raise AssertionError instead.
 2004-07-18 17:34:03 +00:00
Raymond Hettinger
9d7c870c6d SF #950057: itertools.chain doesn't "process" exceptions as they occur 
Both cycle() and chain() were handling exceptions only when switching
input sources.  The patch makes the handle more immediate.

Will backport.
 2004-05-08 19:49:42 +00:00
Raymond Hettinger
5cab2e3a88 Give itertools.repeat() a length method. 2004-02-10 09:25:40 +00:00
Raymond Hettinger
734fb5724f Add a Guido inspired example for groupby(). 2004-01-20 20:04:40 +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
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
f0c5aec85f Minor improvements to itertools.tee(): 
* tee object is no longer subclassable
* independent iterators renamed to "itertools.tee_iterator"
* fixed doc string typo and added entry in the module doc string
 2003-10-26 14:25:56 +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
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
42a61ed277 Simplify doctest of tee(). 2003-09-13 01:01:34 +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
a56f6b6600 SF bug #793826: using itertools.izip to mutate tuples 
Avoid Armin Rigo's dastardly exercise in re-entrancy.
 2003-08-29 23:09:58 +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
77fe69bd08 Re-sync doc tests with the doc updates. 2003-08-08 04:33:19 +00:00
Raymond Hettinger
0242070d04 More tests 
* Test with infinite inputs (using take() on the output)
* Test whether GC can find and eliminate cycles.
 2003-06-29 20:36:23 +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
f0fa1c03a0 Test ability to handle various type of iterators. 2003-05-29 07:18:57 +00:00
Raymond Hettinger
929f06c570 Minor cleanups. 2003-05-16 23:16:36 +00:00
Raymond Hettinger
7c2bb5bc57 * Added a substantial number of edge case and argument tests for 
the itertoolsmodule.
* Taught itertools.repeat(obj, n) to treat negative repeat counts as
  zero.  This behavior matches that for sequences and prevents
  infinite loops.
 2003-05-03 05:59:48 +00:00