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"Lazy" calculations support.

Project description

lz

In what follows

  • python is an alias for python3.5 or any later version (python3.6 and so on),
  • pypy is an alias for pypy3.5 or any later version (pypy3.6 and so on).

Installation

Install the latest pip & setuptools packages versions:

  • with CPython
    python -m pip install --upgrade pip setuptools
    
  • with PyPy
    pypy -m pip install --upgrade pip setuptools
    

User

Download and install the latest stable version from PyPI repository:

  • with CPython
    python -m pip install --upgrade lz
    
  • with PyPy
    pypy -m pip install --upgrade lz
    

Developer

Download the latest version from GitHub repository

git clone https://github.com/lycantropos/lz.git
cd lz

Install:

  • with CPython
    python setup.py install
    
  • with PyPy
    pypy setup.py install
    

Usage

lz provides a bunch of utilities for working with functions, predicates & iterables such as

  1. function composition:

    >>> from lz.functional import compose
    >>> from functools import partial
    >>> sum_of_digits = compose(sum,
                                partial(map, int),
                                str)
    >>> sum_of_digits(1234)
    10
    
  2. flipping positional parameters order

    >>> from lz.functional import flip
    >>> flipped_power = flip(pow)
    >>> flipped_power(2, 4)
    16
    
  3. currying

    >>> from lz.curry import curry 
    >>> curried_power = curry(pow) 
    >>> two_to_power = curried_power(2) 
    >>> list(map(two_to_power, range(10))) 
    [1, 2, 4, 8, 16, 32, 64, 128, 256, 512]
    
  4. negating predicate

    >>> from lz.logical import negate
    >>> false_like = negate(bool)
    >>> false_like([])
    True
    >>> false_like([0])
    False
    
  5. conjoining predicates

    >>> from lz.logical import conjoin
    >>> is_valid_constant_identifier = conjoin(str.isupper, str.isidentifier)
    >>> is_valid_constant_identifier('SECOND_SECTION')
    True
    >>> is_valid_constant_identifier('2ND_SECTION')
    False
    
  6. disjoining predicates

    >>> from lz.logical import disjoin
    >>> alphabetic_or_numeric = disjoin(str.isalpha, str.isnumeric)
    >>> alphabetic_or_numeric('Hello')
    True
    >>> alphabetic_or_numeric('42')
    True
    >>> alphabetic_or_numeric('Hello42')
    False
    
  7. reversing iterable

    >>> from lz.iterating import reverse
    >>> list(reverse(range(10)))
    [9, 8, 7, 6, 5, 4, 3, 2, 1, 0]
    
  8. chunking iterable

    >>> from lz.iterating import chopper
    >>> to_triplets = chopper(3)
    >>> list(to_triplets(range(10)))
    [(0, 1, 2), (3, 4, 5), (6, 7, 8), (9,)]
    
  9. sliding over iterable

    >>> from lz.iterating import slider
    >>> slide_pairwise = slider(2)
    >>> list(slide_pairwise(range(10)))
    [(0, 1), (1, 2), (2, 3), (3, 4), (4, 5), (5, 6), (6, 7), (7, 8), (8, 9)]
    

and many more.

Development

Bumping version

Preparation

Install bump2version.

Pre-release

Choose which version number category to bump following semver specification.

Test bumping version

bump2version --dry-run --verbose $CATEGORY

where $CATEGORY is the target version number category name, possible values are patch/minor/major.

Bump version

bump2version --verbose $CATEGORY

This will set version to major.minor.patch-alpha.

Release

Test bumping version

bump2version --dry-run --verbose release

Bump version

bump2version --verbose release

This will set version to major.minor.patch.

Notes

To avoid inconsistency between branches and pull requests, bumping version should be merged into master branch as separate pull request.

Running tests

Plain:

  • with CPython
    python setup.py test
    
  • with PyPy
    pypy setup.py test
    

Inside Docker container:

  • with CPython
    docker-compose --file docker-compose.cpython.yml up
    
  • with PyPy
    docker-compose --file docker-compose.pypy.yml up
    

Bash script (e.g. can be used in Git hooks):

  • with CPython

    ./run-tests.sh
    

    or

    ./run-tests.sh cpython
    
  • with PyPy

    ./run-tests.sh pypy
    

PowerShell script (e.g. can be used in Git hooks):

  • with CPython
    .\run-tests.ps1
    
    or
    .\run-tests.ps1 cpython
    
  • with PyPy
    .\run-tests.ps1 pypy
    

Project details


Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Filename, size & hash SHA256 hash help File type Python version Upload date
lz-0.0.1-py3-none-any.whl (46.9 kB) Copy SHA256 hash SHA256 Wheel py3
lz-0.0.1.tar.gz (28.2 kB) Copy SHA256 hash SHA256 Source None

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