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Project Description

\(knife\) is a powerful Python multitool loosely inspired by Underscore.js but remixed for maximum pythonicity.

\(knife\) concentrates power that is normally dispersed across the entire Python universe in one convenient shrink-wrapped package.

Vitals

\(knife\) works with CPython 2.6, 2.7, 3.1. and 3.2 and PyPy 1.8.

\(knife\) documentation is at http://readthedocs.org/docs/knife/en/latest/ or http://packages.python.org/knife/

Installation

Install \(knife\) with pip…:

$ pip install knife
[... possibly exciting stuff happening ...]
Successfully installed knife

…or easy_install…:

$ easy_install knife
[... possibly exciting stuff happening ...]
Finished processing dependencies for knife

…or old school by downloading \(knife\) from http://pypi.python.org/pypi/knife/:

$ python setup.py install
[... possibly exciting stuff happening ...]
Finished processing dependencies for knife

3 second knife

Things go in:

>>> from knife import __
>>> gauntlet = __(5, 4, 3, 2, 1)

Things get knifed:

>>> gauntlet.initial().rest().slice(1, 2).last()
knife.lazy.lazyknife ([IN: ([3]) => WORK: ([]) => HOLD: ([]) => OUT: ([3])])

Things come out:

>>> gauntlet.get()
3

Slightly more knife

\(knife\) has 40 plus methods that can be chained into pipelines…

contrived example:

>>> __(5, 4, 3, 2, 1).initial().rest().slice(1, 2).last().get()
3

…or used object-oriented style.

contrived example:

>>> from knife import knife
>>> oo = knife(5, 4, 3, 2, 1)
>>> oo.initial()
knife.active.activeknife ([IN: ([5, 4, 3, 2, 1]) => WORK: ([]) => HOLD: ([]) => OUT: ([5, 4, 3, 2])])
>>> oo.rest()
knife.active.activeknife ([IN: ([5, 4, 3, 2]) => WORK: ([]) => HOLD: ([]) => OUT: ([4, 3, 2])])
>>> oo.slice(1, 2)
knife.active.activeknife ([IN: ([4, 3, 2]) => WORK: ([]) => HOLD: ([]) => OUT: ([3])])
>>> oo.last()
knife.active.activeknife ([IN: ([3]) => WORK: ([]) => HOLD: ([]) => OUT: ([3])])
>>> oo.get()
3

A \(knife\) object can roll its current state back to previous states like snapshots of immediately preceding operations, a baseline snapshot, or even a snapshot of the original arguments.

contrived example:

>>> undone = __(1, 2, 3).prepend(1, 2, 3, 4, 5, 6)
>>> undone.peek()
[1, 2, 3, 4, 5, 6, 1, 2, 3]
>>> undone.append(1).undo().peek()
[1, 2, 3, 4, 5, 6, 1, 2, 3]
>>> undone.append(1).append(2).undo(2).peek()
[1, 2, 3, 4, 5, 6, 1, 2, 3]
>>> undone.snapshot().append(1).append(2).baseline().peek()
[1, 2, 3, 4, 5, 6, 1, 2, 3]
>>> undone.original().peek()
[1, 2, 3]

\(knife\) objects come in two flavors: \(active\) and \(lazy\). \(active.knife\) objects evaluate the result of calling a method immediately after the call. Calling the same method with a \(lazy.knife\) object only yields results when it is iterated over or \(knife.lazy.lazyknife.get\) is called to get results.

\(knife.lazy.lazyknife\) combines all \(knife\) methods in one class:

>>> from knife import lazyknife

It can be imported under its dunderscore (\(knife.__\)) alias.

>>> from knife import __

\(knife.active.activeknife\) also combines every \(knife\) method in one combo \(knife\) class:

>>> from knife import activeknife

It can be imported under its \(knife.knife\) alias:

>>> from knife import knife

\(knife\) methods are available in more focused classes that group related methods together. These classes can also be chained into pipelines.

contrived example:

>>> from knife.active import mathknife, reduceknife
>>> one = mathknife(10, 5, 100, 2, 1000)
>>> two = reduceknife()
>>> one.minmax().pipe(two).merge().back().min().get()
2
>>> one.original().minmax().pipe(two).merge().back().max().get()
1000
>>> one.original().minmax().pipe(two).merge().back().sum().get()
1002
Release History

Release History

0.5.11

This version

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0.5.10

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0.5.9

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0.5.8

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0.5.7

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0.5.6

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0.5.5

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0.5.4

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0.5.3

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0.5.2

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0.5.1

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0.5.0

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Download Files

Download Files

TODO: Brief introduction on what you do with files - including link to relevant help section.

File Name & Checksum SHA256 Checksum Help Version File Type Upload Date
knife-0.5.11.tar.gz (23.9 kB) Copy SHA256 Checksum SHA256 Source Oct 4, 2012
knife-0.5.11.zip (31.5 kB) Copy SHA256 Checksum SHA256 Source Oct 4, 2012

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