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)
Python flexible slugify function

Python flexible slugify function

Dmitry Voronin 471 Dec 20, 2022
Regular Expressions - Use regular expressions to detect date format

A list of all the resources used https://regex101.com/ - To test regex https://w

Ravika Nagpal 1 Jan 04, 2022
Simple Kahoot Botter.

Kahoot A simple Botter made in Python 3 for Kahoot.com. Also sorry for the shitty code lol. How to Run You need Python 3 installed on your device. Aft

7 Jun 29, 2022
Python calculator made with tkinter package

Python-Calculator Python calculator made with tkinter package. works both on Visual Studio Code Or Any Other Ide Or You Just Copy paste The Same Thing

Pro_Gamer_711 1 Nov 11, 2021
Just a simple python script to generate graphs of salt state requisites.

saltstatevis Just a simple python script to generate graphs of salt state requisites. Installation Requirements You will need to install graphviz to r

Dwayn Matthies 3 May 04, 2022
Socorro is the Mozilla crash ingestion pipeline. It accepts and processes Breakpad-style crash reports. It provides analysis tools.

Socorro Socorro is a Mozilla-centric ingestion pipeline and analysis tools for crash reports using the Breakpad libraries. Support This is a Mozilla-s

Mozilla Services 552 Dec 19, 2022
A minimalist production ready plugin system

pluggy - A minimalist production ready plugin system This is the core framework used by the pytest, tox, and devpi projects. Please read the docs to l

pytest-dev 876 Jan 05, 2023
The Doodle Master seeks to turn your UI mockups into real code.

Doodle Master The Doodle Master seeks to turn your UI mockups into real code. Currently this repository just serves to demonstrate a Proof Of Concept

Karanbir Chahal 2.4k Dec 09, 2022
Set of scripts that schedules employees for shifts throughout the week based on availability, shift times, and shift necessities

Automatic-Scheduler Set of scripts that schedules employees for shifts throughout the week based on availability, shift times, and shift necessities *

Matthew 1 May 01, 2022
A tool for removing PUPs using signatures

Unwanted program removal tool A tool for removing PUPs using signatures What is the unwanted program removal tool? The unwanted program removal tool i

4 Sep 20, 2022
Class and mathematical functions for quaternion numbers.

Quaternions Class and mathematical functions for quaternion numbers. Installation Python This is a Python 3 module. If you don't have Python installed

3 Nov 08, 2022
CPython extension implementing Shared Transactional Memory with native-looking interface

CPython extension implementing Shared Transactional Memory with native-looking interface

21 Jul 22, 2022
FollowSpot is a comprehensive audition tracking fullstack web application for entertainment industry professionals.

FollowSpot is a comprehensive audition tracking fullstack web application for entertainment industry professionals. This app allows users to store information/media for all of their auditions while a

Jen Brissman 9 Jul 12, 2022
Goddard A collection of small, simple strategies for Freqtrade

Goddard A collection of small, simple strategies for Freqtrade. Simply add the strategy you choose in your strategies folder and run. ⚠️ General Crypt

Shane Jones 118 Dec 14, 2022
Simulation-Based Inference Benchmark

This repository contains a simulation-based inference benchmark framework, sbibm, which we describe in the associated manuscript "Benchmarking Simulation-based Inference".

SBI Benchmark 58 Oct 13, 2022
A python library for writing parser-based interactive fiction.

About IntFicPy A python library for writing parser-based interactive fiction. Currently in early development. IntFicPy Docs Parser-based interactive f

Rita Lester 31 Nov 23, 2022
Dashboard to view a stock's basic information, RSI, Bollinger bands, EMA, SMA, sentiment analysis via Python

Your One And Only Trading Bot No seriously, we mean it! Contributors Jihad Al-Hussain John Gaffney Shanel Kuchera Kazuki Takehashi Patrick Thornquist

5 May 21, 2022
An unofficial opensource Pokemon cursor theme for Windows and Linux.

pokemon-cursor An unofficial opensource Pokemon cursor theme for Windows and Linux. Cursor Sizes 22 24 28 32 40 48 56 64 72 80 88 96 Colors Quick inst

Kaiz Khatri 72 Dec 26, 2022
Uproot - A script to bring deeply nested files or directories to the surface

UPROOT Bring deeply nested files or folders to the surface Uproot helps convert

Ted 2 Jan 15, 2022
A simple and usefull python calculator.

simplepy-calculator Your simple and fresh calculator. Getting Started Install python3 from the oficial python website or via terminal. Clone this repo

Felix Sanchez 1 Jan 18, 2022