fx · PyPI

 ___
|  _|_ _
|  _|_'_|
|_| |_,_|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.

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Source Distribution

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Uploaded Jun 15, 2014 Source

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