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fix pytest
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Metadata-Version: 2.1
Name: more-itertools
Version: 5.0.0
Summary: More routines for operating on iterables, beyond itertools
Home-page: https://github.com/erikrose/more-itertools
Author: Erik Rose
Author-email: erikrose@grinchcentral.com
License: MIT
Keywords: itertools,iterator,iteration,filter,peek,peekable,collate,chunk,chunked
Platform: UNKNOWN
Classifier: Development Status :: 5 - Production/Stable
Classifier: Intended Audience :: Developers
Classifier: Natural Language :: English
Classifier: License :: OSI Approved :: MIT License
Classifier: Programming Language :: Python :: 2
Classifier: Programming Language :: Python :: 2.7
Classifier: Programming Language :: Python :: 3
Classifier: Programming Language :: Python :: 3.4
Classifier: Programming Language :: Python :: 3.5
Classifier: Programming Language :: Python :: 3.6
Classifier: Programming Language :: Python :: 3.7
Classifier: Topic :: Software Development :: Libraries
Requires-Dist: six (<2.0.0,>=1.0.0)
==============
More Itertools
==============
.. image:: https://coveralls.io/repos/github/erikrose/more-itertools/badge.svg?branch=master
:target: https://coveralls.io/github/erikrose/more-itertools?branch=master
Python's ``itertools`` library is a gem - you can compose elegant solutions
for a variety of problems with the functions it provides. In ``more-itertools``
we collect additional building blocks, recipes, and routines for working with
Python iterables.
----
+------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Grouping | `chunked <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.chunked>`_, |
| | `sliced <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.sliced>`_, |
| | `distribute <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.distribute>`_, |
| | `divide <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.divide>`_, |
| | `split_at <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.split_at>`_, |
| | `split_before <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.split_before>`_, |
| | `split_after <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.split_after>`_, |
| | `bucket <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.bucket>`_, |
| | `grouper <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.grouper>`_, |
| | `partition <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.partition>`_ |
+------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Lookahead and lookback | `spy <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.spy>`_, |
| | `peekable <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.peekable>`_, |
| | `seekable <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.seekable>`_ |
+------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Windowing | `windowed <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.windowed>`_, |
| | `stagger <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.stagger>`_, |
| | `pairwise <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.pairwise>`_ |
+------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Augmenting | `count_cycle <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.count_cycle>`_, |
| | `intersperse <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.intersperse>`_, |
| | `padded <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.padded>`_, |
| | `adjacent <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.adjacent>`_, |
| | `groupby_transform <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.groupby_transform>`_, |
| | `padnone <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.padnone>`_, |
| | `ncycles <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.ncycles>`_ |
+------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Combining | `collapse <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.collapse>`_, |
| | `sort_together <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.sort_together>`_, |
| | `interleave <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.interleave>`_, |
| | `interleave_longest <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.interleave_longest>`_, |
| | `collate <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.collate>`_, |
| | `zip_offset <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.zip_offset>`_, |
| | `dotproduct <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.dotproduct>`_, |
| | `flatten <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.flatten>`_, |
| | `roundrobin <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.roundrobin>`_, |
| | `prepend <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.prepend>`_ |
+------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Summarizing | `ilen <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.ilen>`_, |
| | `first <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.first>`_, |
| | `last <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.last>`_, |
| | `one <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.one>`_, |
| | `unique_to_each <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.unique_to_each>`_, |
| | `locate <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.locate>`_, |
| | `rlocate <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.rlocate>`_, |
| | `consecutive_groups <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.consecutive_groups>`_, |
| | `exactly_n <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.exactly_n>`_, |
| | `run_length <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.run_length>`_, |
| | `map_reduce <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.map_reduce>`_, |
| | `all_equal <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.all_equal>`_, |
| | `first_true <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.first_true>`_, |
| | `nth <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.nth>`_, |
| | `quantify <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.quantify>`_ |
+------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Selecting | `islice_extended <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.islice_extended>`_, |
| | `strip <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.strip>`_, |
| | `lstrip <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.lstrip>`_, |
| | `rstrip <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.rstrip>`_, |
| | `take <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.take>`_, |
| | `tail <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.tail>`_, |
| | `unique_everseen <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertoo ls.unique_everseen>`_, |
| | `unique_justseen <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.unique_justseen>`_ |
+------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Combinatorics | `distinct_permutations <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.distinct_permutations>`_, |
| | `circular_shifts <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.circular_shifts>`_, |
| | `powerset <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.powerset>`_, |
| | `random_product <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.random_product>`_, |
| | `random_permutation <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.random_permutation>`_, |
| | `random_combination <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.random_combination>`_, |
| | `random_combination_with_replacement <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.random_combination_with_replacement>`_, |
| | `nth_combination <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.nth_combination>`_ |
+------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Wrapping | `always_iterable <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.always_iterable>`_, |
| | `consumer <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.consumer>`_, |
| | `with_iter <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.with_iter>`_, |
| | `iter_except <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.iter_except>`_ |
+------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Others | `replace <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.replace>`_, |
| | `numeric_range <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.numeric_range>`_, |
| | `always_reversible <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.always_reversible>`_, |
| | `side_effect <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.side_effect>`_, |
| | `iterate <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.iterate>`_, |
| | `difference <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.difference>`_, |
| | `make_decorator <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.make_decorator>`_, |
| | `SequenceView <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.SequenceView>`_, |
| | `consume <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.consume>`_, |
| | `accumulate <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.accumulate>`_, |
| | `tabulate <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.tabulate>`_, |
| | `repeatfunc <https://more-itertools.readthedocs.io/en/stable/api.html#more_itertools.repeatfunc>`_ |
+------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
Getting started
===============
To get started, install the library with `pip <https://pip.pypa.io/en/stable/>`_:
.. code-block:: shell
pip install more-itertools
The recipes from the `itertools docs <https://docs.python.org/3/library/itertools.html#itertools-recipes>`_
are included in the top-level package:
.. code-block:: python
>>> from more_itertools import flatten
>>> iterable = [(0, 1), (2, 3)]
>>> list(flatten(iterable))
[0, 1, 2, 3]
Several new recipes are available as well:
.. code-block:: python
>>> from more_itertools import chunked
>>> iterable = [0, 1, 2, 3, 4, 5, 6, 7, 8]
>>> list(chunked(iterable, 3))
[[0, 1, 2], [3, 4, 5], [6, 7, 8]]
>>> from more_itertools import spy
>>> iterable = (x * x for x in range(1, 6))
>>> head, iterable = spy(iterable, n=3)
>>> list(head)
[1, 4, 9]
>>> list(iterable)
[1, 4, 9, 16, 25]
For the full listing of functions, see the `API documentation <https://more-itertools.readthedocs.io/en/latest/api.html>`_.
Development
===========
``more-itertools`` is maintained by `@erikrose <https://github.com/erikrose>`_
and `@bbayles <https://github.com/bbayles>`_, with help from `many others <https://github.com/erikrose/more-itertools/graphs/contributors>`_.
If you have a problem or suggestion, please file a bug or pull request in this
repository. Thanks for contributing!
Version History
===============
5.0.0
-----
* New itertools:
* split_into (thanks to rovyko)
* unzip (thanks to bmintz)
* substrings (thanks to pylang)
* Changes to existing itertools:
* ilen was optimized a bit (thanks to MSeifert04, achampion, and bmintz)
* first_true now returns ``None`` by default. This is the reason for the major version bump - see below. (thanks to sk and OJFord)
* Other changes:
* Some code for old Python versions was removed (thanks to hugovk)
* Some documentation mistakes were corrected (thanks to belm0 and hugovk)
* Tests now run properly on 32-bit versions of Python (thanks to Millak)
* Newer versions of CPython and PyPy are now tested against
The major version update is due to the change in the default return value of
first_true. It's now ``None``.
.. code-block:: python
>>> from more_itertools import first_true
>>> iterable = [0, '', False, [], ()] # All these are False
>>> answer = first_true(iterable)
>>> print(answer)
None
4.3.0
-----
* New itertools:
* last (thanks to tmshn)
* replace (thanks to pylang)
* rlocate (thanks to jferard and pylang)
* Improvements to existing itertools:
* locate can now search for multiple items
* Other changes:
* The docs now include a nice table of tools (thanks MSeifert04)
4.2.0
-----
* New itertools:
* map_reduce (thanks to pylang)
* prepend (from the `Python 3.7 docs <https://docs.python.org/3.7/library/itertools.html#itertools-recipes>`_)
* Improvements to existing itertools:
* bucket now complies with PEP 479 (thanks to irmen)
* Other changes:
* Python 3.7 is now supported (thanks to irmen)
* Python 3.3 is no longer supported
* The test suite no longer requires third-party modules to run
* The API docs now include links to source code
4.1.0
-----
* New itertools:
* split_at (thanks to michael-celani)
* circular_shifts (thanks to hiqua)
* make_decorator - see the blog post `Yo, I heard you like decorators <https://sites.google.com/site/bbayles/index/decorator_factory>`_
for a tour (thanks to pylang)
* always_reversible (thanks to michael-celani)
* nth_combination (from the `Python 3.7 docs <https://docs.python.org/3.7/library/itertools.html#itertools-recipes>`_)
* Improvements to existing itertools:
* seekable now has an ``elements`` method to return cached items.
* The performance tradeoffs between roundrobin and
interleave_longest are now documented (thanks michael-celani,
pylang, and MSeifert04)
4.0.1
-----
* No code changes - this release fixes how the docs display on PyPI.
4.0.0
-----
* New itertools:
* consecutive_groups (Based on the example in the `Python 2.4 docs <https://docs.python.org/release/2.4.4/lib/itertools-example.html>`_)
* seekable (If you're looking for how to "reset" an iterator,
you're in luck!)
* exactly_n (thanks to michael-celani)
* run_length.encode and run_length.decode
* difference
* Improvements to existing itertools:
* The number of items between filler elements in intersperse can
now be specified (thanks to pylang)
* distinct_permutations and peekable got some minor
adjustments (thanks to MSeifert04)
* always_iterable now returns an iterator object. It also now
allows different types to be considered iterable (thanks to jaraco)
* bucket can now limit the keys it stores in memory
* one now allows for custom exceptions (thanks to kalekundert)
* Other changes:
* A few typos were fixed (thanks to EdwardBetts)
* All tests can now be run with ``python setup.py test``
The major version update is due to the change in the return value of always_iterable.
It now always returns iterator objects:
.. code-block:: python
>>> from more_itertools import always_iterable
# Non-iterable objects are wrapped with iter(tuple(obj))
>>> always_iterable(12345)
<tuple_iterator object at 0x7fb24c9488d0>
>>> list(always_iterable(12345))
[12345]
# Iterable objects are wrapped with iter()
>>> always_iterable([1, 2, 3, 4, 5])
<list_iterator object at 0x7fb24c948c50>
3.2.0
-----
* New itertools:
* lstrip, rstrip, and strip
(thanks to MSeifert04 and pylang)
* islice_extended
* Improvements to existing itertools:
* Some bugs with slicing peekable-wrapped iterables were fixed
3.1.0
-----
* New itertools:
* numeric_range (Thanks to BebeSparkelSparkel and MSeifert04)
* count_cycle (Thanks to BebeSparkelSparkel)
* locate (Thanks to pylang and MSeifert04)
* Improvements to existing itertools:
* A few itertools are now slightly faster due to some function
optimizations. (Thanks to MSeifert04)
* The docs have been substantially revised with installation notes,
categories for library functions, links, and more. (Thanks to pylang)
3.0.0
-----
* Removed itertools:
* ``context`` has been removed due to a design flaw - see below for
replacement options. (thanks to NeilGirdhar)
* Improvements to existing itertools:
* ``side_effect`` now supports ``before`` and ``after`` keyword
arguments. (Thanks to yardsale8)
* PyPy and PyPy3 are now supported.
The major version change is due to the removal of the ``context`` function.
Replace it with standard ``with`` statement context management:
.. code-block:: python
# Don't use context() anymore
file_obj = StringIO()
consume(print(x, file=f) for f in context(file_obj) for x in u'123')
# Use a with statement instead
file_obj = StringIO()
with file_obj as f:
consume(print(x, file=f) for x in u'123')
2.6.0
-----
* New itertools:
* ``adjacent`` and ``groupby_transform`` (Thanks to diazona)
* ``always_iterable`` (Thanks to jaraco)
* (Removed in 3.0.0) ``context`` (Thanks to yardsale8)
* ``divide`` (Thanks to mozbhearsum)
* Improvements to existing itertools:
* ``ilen`` is now slightly faster. (Thanks to wbolster)
* ``peekable`` can now prepend items to an iterable. (Thanks to diazona)
2.5.0
-----
* New itertools:
* ``distribute`` (Thanks to mozbhearsum and coady)
* ``sort_together`` (Thanks to clintval)
* ``stagger`` and ``zip_offset`` (Thanks to joshbode)
* ``padded``
* Improvements to existing itertools:
* ``peekable`` now handles negative indexes and slices with negative
components properly.
* ``intersperse`` is now slightly faster. (Thanks to pylang)
* ``windowed`` now accepts a ``step`` keyword argument.
(Thanks to pylang)
* Python 3.6 is now supported.
2.4.1
-----
* Move docs 100% to readthedocs.io.
2.4
-----
* New itertools:
* ``accumulate``, ``all_equal``, ``first_true``, ``partition``, and
``tail`` from the itertools documentation.
* ``bucket`` (Thanks to Rosuav and cvrebert)
* ``collapse`` (Thanks to abarnet)
* ``interleave`` and ``interleave_longest`` (Thanks to abarnet)
* ``side_effect`` (Thanks to nvie)
* ``sliced`` (Thanks to j4mie and coady)
* ``split_before`` and ``split_after`` (Thanks to astronouth7303)
* ``spy`` (Thanks to themiurgo and mathieulongtin)
* Improvements to existing itertools:
* ``chunked`` is now simpler and more friendly to garbage collection.
(Contributed by coady, with thanks to piskvorky)
* ``collate`` now delegates to ``heapq.merge`` when possible.
(Thanks to kmike and julianpistorius)
* ``peekable``-wrapped iterables are now indexable and sliceable.
Iterating through ``peekable``-wrapped iterables is also faster.
* ``one`` and ``unique_to_each`` have been simplified.
(Thanks to coady)
2.3
-----
* Added ``one`` from ``jaraco.util.itertools``. (Thanks, jaraco!)
* Added ``distinct_permutations`` and ``unique_to_each``. (Contributed by
bbayles)
* Added ``windowed``. (Contributed by bbayles, with thanks to buchanae,
jaraco, and abarnert)
* Simplified the implementation of ``chunked``. (Thanks, nvie!)
* Python 3.5 is now supported. Python 2.6 is no longer supported.
* Python 3 is now supported directly; there is no 2to3 step.
2.2
-----
* Added ``iterate`` and ``with_iter``. (Thanks, abarnert!)
2.1
-----
* Added (tested!) implementations of the recipes from the itertools
documentation. (Thanks, Chris Lonnen!)
* Added ``ilen``. (Thanks for the inspiration, Matt Basta!)
2.0
-----
* ``chunked`` now returns lists rather than tuples. After all, they're
homogeneous. This slightly backward-incompatible change is the reason for
the major version bump.
* Added ``@consumer``.
* Improved test machinery.
1.1
-----
* Added ``first`` function.
* Added Python 3 support.
* Added a default arg to ``peekable.peek()``.
* Noted how to easily test whether a peekable iterator is exhausted.
* Rewrote documentation.
1.0
-----
* Initial release, with ``collate``, ``peekable``, and ``chunked``. Could
really use better docs.
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