Skip to main content

fx - a functional programming approach

Project description

 ___
|  _|_ _
|  _|_'_|
|_| |_,_|igher-order function coding.

Introduction

TL;DR - YAGNI.

Inspired by Haskell’s rich set of operators, this is an approach to functional programming with operators in Python.

“It’s fun… It’s insane… It’s insanely fun.”

—John Doe

Features

  • Currying functions with <<, &
  • Piping output of functions with |
  • Composing functions with **
  • Flipping order of arguments of function with ~
  • and more

Examples

>>> from fx import f
>>> double_all = f(map) << 2 .__mul__ | list
>>> double_all([1, 2, 3])
[2, 4, 6]
>>> double_all |= f(map) << str | ' '.join
>>> double_all([1, 2, 3])
'2 4 6'
>>> sum_upto = 1 .__add__ | f(range) << 1 | sum
>>> sum_upto(100)
5050
>>> parse_hex_str = ~f(int) << 16
>>> parse_hex_str('ff')
255
>>> parse_hex_str('c0ffee')
12648430
>>> # project euler problem 1
>>> euler_p1 = f(range) << 1 | f(filter) << (lambda n: n % 3 == 0 or n % 5 == 0) | sum
>>> euler_p1(10)
23
>>> euler_p1(1000)
233168
>>> # project euler problem 20
>>> fact = f(lambda n: 1 if n == 1 else n * fact(n - 1))
>>> euler_p20 = str ** fact | sum ** f(map) << int
>>> euler_p20(10)
27
>>> euler_p20(100)
648

Requirements

  • CPython >= 2.6

Installation

Install from PyPI:

pip install fx

Install from source, download source package, decompress, then cd into source directory, run:

make install

License

BSD New, see LICENSE for details.

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
fx-0.3.tar.gz (19.3 kB) Copy SHA256 hash SHA256 Source None Jun 15, 2014

Supported by

Elastic Elastic Search Pingdom Pingdom Monitoring Google Google BigQuery Sentry Sentry Error logging AWS AWS Cloud computing DataDog DataDog Monitoring Fastly Fastly CDN DigiCert DigiCert EV certificate StatusPage StatusPage Status page