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.
Links
- Documentation:
- Issue Tracker:
- Source Package @ PyPI:
- Mercurial Repository @ bitbucket:
- Git Repository @ Github:
