Izy - Python functions and classes that make python even easier than it is

Related tags

Miscellaneousizy
Overview

izy

Python functions and classes that make it even easier! You will wonder why these are not already built-in in python! :)

You can skip README and follow (and run) its equivalent demo notebook.

The sooner you pip install izy, the less time you waste! Just 3 keystrokes to install and import :)

pip install izy

Now that you have it, here are the functionlities:

Sorting

Some operations like argsort need 1 or 2 lines to implement in python, but the code is not pythonically readable as it should be. Some other functions like topk are somehow hidden in the built-in modules, which we expose with ease!

Let us have a big list of numbers and give it an izy try:

>>> from izy import *
>>> mylist = [4.2, 10, -8, 0, 4, 33, 6, 97, 1, 6., 41, -6, 0.0]

>>> topk(mylist, 4)
[97, 41, 33, 10]

>> topk(mylist, -3)     # as you would expect
[-8, -6, 0]             

>>> argmax(mylist)      # not to mention argmin
7

>>> argsort(mylist)
[2, 11, 3, 12, 8, 4, 0, 6, 9, 1, 5, 10, 7]

>>> argsort(mylist, reverse=True)
[7, 10, 5, 1, 6, 9, 0, 4, 8, 3, 12, 11, 2]

>>> descending(mylist)   # I like it more than sorted(x, reverse=True)
[97, 41, 33, 10, 6, 6.0, 4.2, 4, 1, 0, 0.0, -6, -8]

>>> reorder(mylist, argsort(mylist))    # like numpy array indexing
[-8, -6, 0, 0.0, 1, 4, 4.2, 6, 6.0, 10, 33, 41, 97]

If you have a dict (or more precisely a Mapping), the arg* functions take keys as indices:

>>> mydict = {'a': 1, 'b': 4, 'c': -1}

>>> argmin(mydict)
'c'

>>> reorder(mydict, argsort(mydict))    # sorry it cannot return a sorted dict :) 
[-1, 1, 4]                              # maybe an OrderedDict in the future...

Scorer

The Scorer is a dict subclass for scoring hashable items. It generalizes functionality of built-in Counter to floating-point numbers with full math operation support.

>>> from izy import Scorer
>>> s1 = Scorer({'a': 1, 'b': 2, 'c': 5})
>>> s1['d'] = 3
>>> s1
Scorer({c: 5, d: 3, b: 2, a: 1})

>>> s2 = Scorer('abc', [-2, 3, 4])
>>> s2
Scorer({c: 4, b: 3, a: -2})

Mathematical operators (+, -, *, /, //, %, **) are supported for both Scorer and scalar right-hand operands.

>>> s1 + s2         
Scorer({c: 9, b: 5, d: 3, a: -1})  

>>> s1 / 4
Scorer({c: 1.25, d: 0.75, b: 0.5, a: 0.25})

WARNING! To support partial update with math operations, we carry non-common items from the first operand unchanged, but those from the second operand are ignored.

Unary math operators (+, -) are available too.

>>> +s2             # special usage for useless uniary `+` (only keeps positive itmes)
Scorer({c: 4, b: 3})

>>> s1 + (+s2)      # not equivalent to s1 + s2
Scorer({c: 9, b: 5, d: 3, a: 1})

We also have abs(), round():

>>> abs(s2) 
Scorer({c: 4, b: 3, a: 2})

Logical operators &, | apply element-wise min/max and they are also applicable to scalars. As Scorer is not a set or even multiset (like Counter), we don't refer to these as intersection and union, but the functionalities are still similar.

>>> s1 & s2         # ~ min (drops non-common items)
Scorer({c: 4, b: 2, a: -2})

>>> s1 & 2          # drops items with score less than 2
Scorer({c: 5, d: 3, b: 2})

>>> s1 | s2         # ~ max
Scorer({c: 5, b: 3, d: 3, a: 1})

About the above warning, note that (s1 | (s1 & s2)) gives the subset of s1 which also exists in s2. You can use this to force math operations to return common items only.

And finally the ultimate goal of the Scorer is to sort its items according to scores and give us the best, topk (or worst, bottomk).

>>> s1.best()           
('c', 5)

>>> s1.topk(3)          # alias to `s1.best` but more readable when you specify the number of items
[('c', 5), ('d', 3), ('b', 2)]

>>> s1.topk(-2)         # negative k means bottom k
[('a', 1), ('b', 2)]

>>> s1.ascending()      # prefer this to `best` or `topk` with special values of n or k (None, 0, inf)
[('a', 1), ('b', 2), ('d', 3), ('c', 5)]

>>> s1.median()         # if scorer length is even, lower median is returned
('b', 2)

Decorators

Python functools is really interesting, but it really lacks some generally usefull decorators.

First, @returns() and @yields() make your function/generator return/yield namedtuples to more pythonically access your function output. It also looks like an easy documentation to me (about the meaning of what function returns and not just the type).

@returns('x', 'plus_one')
def myfunction(x):
    return x, x+1

@yields('a', 'a_doubled')
def mygenerator(x):
    for i in range(x):
        yield {'a':i, 'a_doubled': i*2}

n = myfunction(5).plus_one

@returns_time() calculates function runtime and returns it as a datetime.timedelta object. You can change time format to milis (int) or seconds (float). It returns a namedtuple which you can rename using @returns.

@returns_time()
def timed(x):
    z = 0
    for i in range(x * 1000000):
        z += i

@returns('output', 'milis')
@returns_time(milis=True)
def timed_milis(x):
    z = 0
    for i in range(x * 1000000):
        z += i
    return 'done'

>>> timed(64)
timed_output(output=None, time=datetime.timedelta(seconds=2, microseconds=530048))

>>> timed_milis(32)
timed_milis_output(output='done', milis=1289)

@logs() does what it says at three stages: before calling, after returning and on exceptions. You can control log level for each stage, log to_file using default logger (named after the function) or pass your own logging.Logger.

@logs(before=logging.DEBUG, after=logging.INFO, to_file='logged.log')
def logged(x, **kw):
    for i in range(1000000):
        x += i

>>> logged(1, key1=5, key2=7.2)

[2021-12-31 08:56:33][logged][DEBUG] - Function `logged` called with args: (4, key1=5, key2=7.2)
[2021-12-31 08:56:33][logged][INFO] - Function `logged` returned after 0:00:00.029084 with result: None

@fix_this() reminds you to fix something in stronger way than a passive comment. It raises UserWarning at runtime and does this everytime :)

@fix_this('It always prints ValueError, errors should be raised!')
def please(x):
    print('ValueError')

This one @ignores() given exceptions (and returns None). Who knows when and why you need this? :) You can stack it on top of @logs() to be aware of ignored exceptions.

@ignores(ValueError, IndexError)
@logs()
def ignorer(x):
    for i in range(x):
        raise ValueError

Want more useful exception handler? @fallsback() falls back on specified exception to predefined return value or another callable. For multiple exceptions, stack it like this:

@fallsback(ZeroDivisionError, 1)
@fallsback(ValueError, lambda x: x**2)
def multifall2callable(x):
    if x < 0:
        raise ValueError
    else:
        raise ZeroDivisionError
You might also like...
A wrapper script to make working with ADB (Android Debug Bridge) easier

Python-ADB-Wrapper A wrapper script to make working with ADB (Android Debug Bridge) easier This project was just a simple test to see if I could wrap

JARVIS PC Assistant is an assisting program to make your computer easier to use

JARVIS-PC-Assistant JARVIS PC Assistant is an assisting program to make your computer easier to use Welcome to the J.A.R.V.I.S. PC Assistant help file

Provide error messages for Python exceptions, even if the original message is empty

errortext is a Python package to provide error messages for Python exceptions, even if the original message is empty.

Check is a integer is even

Is Even Check if interger is even using isevenapi. https://isevenapi.xyz/ Main features: cache memoization api retry handler hide ads Install pip inst

A GUI love Calculator which saves all the User Data in text file(sql based script will be uploaded soon). Interative GUI. Even For Admin Panel

Love-Calculator A GUI love Calculator which saves all the User Data in text file(sql based script will be uploaded soon). Interative GUI, even For Adm

Make your functions return something meaningful, typed, and safe!
Make your functions return something meaningful, typed, and safe!

Make your functions return something meaningful, typed, and safe! Features Brings functional programming to Python land Provides a bunch of primitives

Macros in Python: quasiquotes, case classes, LINQ and more!

MacroPy3 1.1.0b2 MacroPy is an implementation of Syntactic Macros in the Python Programming Language. MacroPy provides a mechanism for user-defined fu

This is a backport of the BaseExceptionGroup and ExceptionGroup classes from Python 3.11.

This is a backport of the BaseExceptionGroup and ExceptionGroup classes from Python 3.11. It contains the following: The exceptiongroup.BaseExceptionG

Python Classes Without Boilerplate

attrs is the Python package that will bring back the joy of writing classes by relieving you from the drudgery of implementing object protocols (aka d

Releases(v0.2.0)
A deployer and package manager for OceanBase open-source software.

OceanBase Deploy OceanBase Deploy (简称 OBD)是 OceanBase 开源软件的安装部署工具。OBD 同时也是包管理器,可以用来管理 OceanBase 所有的开源软件。本文介绍如何安装 OBD、使用 OBD 和 OBD 的命令。 安装 OBD 您可以使用以下方

OceanBase 59 Dec 27, 2022
Wordle-solve - Attempting to solve wordle

Wordle Solver Run with python wordle_beater.py. This hardmode wordle solver take

Tom Lockwood 42 Oct 11, 2022
Blender Light Manipulation - A script that makes it easier to work with light

Blender Light Manipulation A script that makes it easier to work with light 1. Wstęp W poniższej dokumentacji przedstawiony zostanie skrypt, który swo

Tomasz 1 Oct 19, 2021
Adds a Bake node to Blender's shader node system

Bake to Target This Blender Addon adds a new shader node type capable of reducing the texture-bake step to a single button press. Please note that thi

Thomas 8 Oct 04, 2022
Purge all transformation orientations addon for Blender 2.8 and newer versions

CTO Purge This add-on adds a new button to Blender's Transformation Orientation panel which empowers the user to purge all of his/her custom transform

MMMrqs 10 Dec 29, 2022
A example project's description is a high-level overview of why you’re doing a project.

A example project's description is a high-level overview of why you’re doing a project.

Nikita Matyukhin 12 Mar 23, 2022
EasyBuild is a software build and installation framework that allows you to manage (scientific) software on High Performance Computing (HPC) systems in an efficient way.

EasyBuild is a software build and installation framework that allows you to manage (scientific) software on High Performance Computing (HPC) systems in an efficient way.

EasyBuild community 87 Dec 27, 2022
A dead-simple service that notifies you when something goes down.

Totmannschalter Totmannschalter (German for dead man's switch) is a simple service that notifies you when it has not received any message from a servi

1 Dec 20, 2021
Скрипт позволяет заводить задачи в Панель мониторинга YouTrack на основе парсинга сайта safe-surf.ru

Скрипт позволяет заводить задачи в Панель мониторинга YouTrack на основе парсинга сайта safe-surf.ru

Bad_karma 3 Feb 12, 2022
Companion Web site for Fluent Python, Second Edition

Fluent Python, the site Source code and content for fluentpython.com. The site complements Fluent Python, Second Edition with extra content that did n

Fluent Python 49 Dec 08, 2022
AHP Calculator - A method for organizing and evaluating complicated decisions, using Maths and Psychology

AHP Calculator - A method for organizing and evaluating complicated decisions, using Maths and Psychology

16 Aug 08, 2022
More granular intermediaries for legacy Minecraft versions

Orinthe/Intermediary mappings This repository contains the match information between different versions of Minecraft created by the Orinthe project, a

4 Jan 11, 2022
A browser login credentials thief for windows and Linux

Thief 🦹🏻 A browser login credentials thief for windows and Linux Python script to decrypt login credentials from browsers in windows or linux Decryp

Ash 1 Dec 13, 2021
The purpose of this code base is to add a specified signal-to-noise ratio noise from MUSAN dataset to a pure speech signal and to generate far-field speech data using room impulse response data from BUT [email protected] Reverb Database.

Add_noise_and_rir_to_speech The purpose of this code base is to add a specified signal-to-noise ratio noise from MUSAN dataset to a pure speech signal

Yunqi Chen 7 Oct 30, 2022
Gobigger Explore For Python

Gobigger-Explore 🔮 GoBigger Challenge 2021 Baseline en/中文 🤖 Introduction This is the baseline of GoBigger Multi-Agent Decision Intelligence Challeng

OpenDILab 145 Dec 22, 2022
Grimoire is a Python library for creating interactive fiction as hyperlinked html.

Grimoire Grimoire is a Python library for creating interactive fiction as hyperlinked html. Installation pip install grimoire-if Usage Check out the

Scott Russell 5 Oct 11, 2022
chiarose(XCR) based on chia(XCH) source code fork, open source public chain

chia-rosechain 一个无耻的小活动 | A shameless little event 如果您喜欢这个项目,请点击star 将赠送您520朵玫瑰,可以去 facebook 留下您的(xcr)地址,和github用户名。 If you like this project, please

ddou123 376 Dec 14, 2022
a simple functional programming language compiler written in python

Functional Programming Language A compiler for my small functional language. Written in python with SLY lexer/parser generator library. Requirements p

Ashkan Laei 3 Nov 05, 2021
MDAnalysis tool to calculate membrane curvature.

The MDAkit for membrane curvature analysis is part of the Google Summer of Code program and it is linked to a Code of Conduct.

MDAnalysis 19 Oct 20, 2022
This module is for finding the execution time of a whole python program

exetime 3.8 This module is for finding the execution time of a whole program How to install $ pip install exetime Contents: General Information Instru

Saikat Das 4 Oct 18, 2021