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