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Reverse enumerate.

Project description

renumerate

Reverse enumerate.

Overview

renumerate(sequence, start=len(sequence)-1, end=0):

Return an enumerate object.
sequence must be an object that has a __reversed__() method or supports the sequence protocol (the __len__() method and the __getitem__() method with integer arguments starting at 0).
The __next__() method of the iterator returned by renumerate() returns a tuple containing a count (from start which defaults to len(sequence) - 1 or ends at end which defaults to 0 - but not both) and the values obtained from reverse iterating over sequence.

PyPI record.

Documentation.

Usage

>>> from renumerate import renumerate
>>> seasons = ['Spring', 'Summer', 'Fall', 'Winter']
>>> list(renumerate(seasons))
[(3, 'Winter'), (2, 'Fall'), (1, 'Summer'), (0, 'Spring')]
>>> list(renumerate(seasons, start=4))
[(4, 'Winter'), (3, 'Fall'), (2, 'Summer'), (1, 'Spring')]
>>> list(renumerate(seasons, end=2))
[(5, 'Winter'), (4, 'Fall'), (3, 'Summer'), (2, 'Spring')]

Equivalent to:

def renumerate(sequence, start=None, end=None):
    if start is not None and end is not None:
        raise TypeError("renumerate() only accepts start argument or end argument"
                        " - not both.")
    if start is None: start = len(sequence) - 1
    if end   is None: end   = 0
    n = start + end
    for elem in reversed(sequence):
        yield n, elem
        n -= 1

Installation

Prerequisites:

To install run:

python -m pip install --upgrade renumerate

Development

Prerequisites:

  • Development is strictly based on tox. To install it run:

    python -m pip install --upgrade tox

Visit development page.

Installation from sources:

clone the sources:

git clone https://github.com/karpierz/renumerate.git renumerate

and run:

python -m pip install ./renumerate

or on development mode:

python -m pip install --editable ./renumerate

License

Copyright (c) 2016-2022 Adam Karpierz
Licensed under the zlib/libpng License
Please refer to the accompanying LICENSE file.

Authors

Changelog

1.1.9 (2022-08-22)

  • Setup update.

1.1.8 (2022-07-24)

  • Add support for Python 3.10 and 3.11

  • Setup update (currently based mainly on pyproject.toml).

1.1.7 (2022-01-10)

  • Drop support for Python 3.6.

  • Copyright year update.

  • Setup update.

1.1.6 (2021-12-11)

  • Setup update.

1.1.5 (2021-07-20)

  • Setup general update and improvement.

1.1.4 (2020-10-18)

  • Drop support for Python 3.5.

  • Add unittests.

  • Fixed docs setup.

1.0.13 (2020-09-22)

  • Add support for Python 3.8 and 3.9.

  • Drop support for Python 3.4.

  • Setup: fix an improper dependencies versions.

  • Setup general update and cleanup.

1.0.9 (2019-05-22)

  • Drop support for Python 2.

1.0.8 (2019-05-21)

  • Update required setuptools version.

  • Setup update and improvements.

  • This is the latest release that supports Python 2.

1.0.7 (2018-11-08)

  • Drop support for Python 2.6 and 3.0-3.3.

  • Update required setuptools version.

1.0.6 (2018-05-08)

  • Fix a bug in description.

  • Update required setuptools version.

  • Improve and simplify setup and packaging.

1.0.5 (2018-02-26)

  • Improve and simplify setup and packaging.

1.0.4 (2018-01-28)

  • Fix a bug and inconsistencies in tox.ini

  • Update of README.rst.

1.0.1 (2018-01-24)

  • Update required Sphinx version.

  • Update doc Sphinx configuration files.

1.0.0 (2017-11-18)

  • Setup improvements.

  • Other minor improvements.

1.0.0b1 (2017-11-18)

  • Minor improvements.

0.3.4 (2017-01-05)

  • Minor setup improvements.

0.3.3 (2016-09-25)

  • Fix bug in setup.py

0.3.1 (2016-09-25)

  • More PEP8 compliant.

0.2.2 (2016-09-24)

  • Description suplement

  • Minor fixes.

0.1.1 (2016-09-24)

  • First useful release.

0.0.2 (2016-09-23)

  • Initial release.

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