Minimal, super readable string pattern matching for python.

Overview

logo

simplematch

Minimal, super readable string pattern matching for python.

PyPI Version PyPI - License tests

import simplematch

simplematch.match("He* {planet}!", "Hello World!")
>>> {"planet": "World"}

simplematch.match("It* {temp:float}°C *", "It's -10.2°C outside!")
>>> {"temp": -10.2}

Installation

pip install simplematch

(Or just drop the simplematch.py file in your project.)

Syntax

simplematch has only two syntax elements:

  • wildcard *
  • capture group {name}

Capture groups can be named ({name}), unnamed ({}) and typed ({name:float}).

The following types are available:

  • int
  • float
  • email
  • url
  • ipv4
  • ipv6
  • bitcoin
  • ssn (social security number)
  • ccard (matches Visa, MasterCard, American Express, Diners Club, Discover, JCB)

For now, only named capture groups can be typed.

Then use one of these functions:

import simplematch

simplematch.match(pattern, string) # -> returns a `dict` on match, `None` otherwise.
simplematch.test(pattern, string)  # -> returns `True` on match, `False` otherwise.

Or use a Matcher object:

import simplematch as sm

matcher = sm.Matcher(pattern)

matcher.match(string) # -> returns a dict or None
matcher.test(string)  # -> returns True / False
matcher.regex         # -> shows the generated regex

Basic usage

import simplematch as sm

# extracting data
sm.match(
    pattern="Invoice_*_{year}_{month}_{day}.pdf",
    string="Invoice_RE2321_2021_01_15.pdf")
>>> {"year": "2021", "month": "01", "day": "15"}

# test match only
sm.test("ABC-{value:int}", "ABC-13")
>>> True

Typed matches

import simplematch as sm

matcher = sm.Matcher("{year:int}-{month:int}: {value:float}")

# extracting data
matcher.match("2021-01: -12.786")
>>> {"year": 2021, "month": 1, "value": -12.786}

# month is no integer -> no match and return `None`.
matcher.match("2021-AB: Hello")
>>> None

# no extraction, only test for match
matcher.test("1234-01: 123.123")
>>> True

# show generated regular expression
matcher.regex
>>> '^(?P<year>[+-]?[0-9]+)\\-(?P<month>[+-]?[0-9]+):\\ (?P<value>[+-]?(?:[0-9]*[.])?[0-9]+)$'

# show registered converters
matcher.converters
>>> {'year': <class 'int'>, 'month': <class 'int'>, 'value': <class 'float'>}

Register your own types

You can register your own types to be available for the {name:type} matching syntax with the register_type function.

simplematch.register_type(name, regex, converter=str)

  • name is the name to use in the matching syntax
  • regex is a regular expression to match your type
  • converter is a callable to convert a match (str by default)

Example

Register a smiley type to detect smileys (:), :(, :/) and getting their moods:

import simplematch as sm

def mood_convert(smiley):
    moods = {
        ":)": "good",
        ":(": "bad",
        ":/": "sceptic",
    }
    return moods.get(smiley, "unknown")

sm.register_type("smiley", r":[\)\(\/]", mood_convert)

sm.match("I'm feeling {mood:smiley} *", "I'm feeling :) today!")
>>> {"mood": "good"}

Background

simplematch aims to fill a gap between parsing with str.split() and regular expressions. It should be as simple as possible, fast and stable.

The simplematch syntax is transpiled to regular expressions under the hood, so matching performance should be just as good.

I hope you get some good use out of this!

Contributions

Contributions are welcome! Just submit a PR and maybe get in touch with me via email before big changes.

License

MIT

Owner
Thomas Feldmann
Thomas Feldmann
Ml-design-patterns - Source code accompanying O'Reilly book: Machine Learning Design Patterns

This is not an official Google product ml-design-patterns Source code accompanying O'Reilly book: Title: Machine Learning Design Patterns Authors: Val

Google Cloud Platform 1.5k Jan 05, 2023
Just RESTing

petnica-api-workshop Just RESTing Setup Using pipenv You can setup this project with pipenv if you want isolated libraries. After you've installed pip

Aleksa Tešić 1 Oct 23, 2021
OCR-ID-Card VietNamese (new id-card)

OCR-ID-Card VietNamese (new id-card) run project: download 2 file weights and pu

12 Jun 15, 2022
MODeflattener deobfuscates control flow flattened functions obfuscated by OLLVM using Miasm.

MODeflattener deobfuscates control flow flattened functions obfuscated by OLLVM using Miasm.

Suraj Malhotra 138 Jan 07, 2023
Doom o’clock is a website/project that features a countdown of “when will the earth end” and a greenhouse gas effect emission prediction that’s predicted

Doom o’clock is a website/project that features a countdown of “when will the earth end” and a greenhouse gas effect emission prediction that’s predicted

shironeko(Hazel) 4 Jan 01, 2022
Check if Python package names are available on PyPI.

😻 isavailable Can I haz this Python package on PyPI? Check if Python package names are available on PyPI. Usage $ isavailable checks whether your des

Felipe S. S. Schneider 3 May 18, 2022
You will need to install a few python packages for this one.

Features Bait support Auto repair will repair every 10 catches Anti detection (still a work in progress) but using random times and click positions Pr

12 Sep 21, 2022
My custom Fedora ostree build with sway/wayland.

Ramblurr's Sway Desktop This is an rpm-ostree based minimal Fedora developer desktop with the sway window manager and podman/toolbox for doing develop

Casey Link 1 Nov 28, 2021
A brainfuck-based game oriented language written in python.

GF.py STILL WIP Gamefuck.py is a programming language based off brainfuck. It is oriented towards game development, and as such has many commands spec

Xenon 1 Feb 23, 2022
Tensorboard plugin 3d with python

tensorboard-plugin-3d Overview In this example, we render a run selector dropdown component. When the user selects a run, it shows a preview of all sc

KitwareMedical 26 Nov 14, 2022
On this repo, you'll find every codes I made during my NSI classes (informatical courses)

👨‍💻 👩‍💻 school-codes On this repo, you'll find every codes I made during my NSI classes (informatical courses) French for now since this repo is d

EDM 1.15 3 Dec 17, 2022
A tool for fixing inconsistent timestamp metadata (atime, ctime, and mtime).

Mtime Fixer Mtime Fixer is a tool for fixing inconsistent timestamp metadata (atime, ctime, and mtime). Sometimes timestamp metadata of folders are in

Halit Şimşek 2 Jan 11, 2022
Lightweight Scheduled Blocks Checker for Current Epoch. No cardano-node Required, data is taken from blockfrost.io

ReLeaderLogs For Cardano Stakepool Operators: Lightweight Scheduled Blocks Checker for Current Epoch. No cardano-node Required, data is taken from blo

SNAKE (Cardano Stakepool) 2 Oct 19, 2021
Fixes your Microphone Level to one specific value.

MicLeveler Fixes your Microphone Level to one specific value. Intention A friend of mine has the problem that some programs are setting his microphone

Moritz Timpe 2 Oct 14, 2021
An example of Connecting a MySQL Database with Python Code

An example of Connecting And Query Data a MySQL Database with Python Code And How to install Table of contents General info Technologies Setup General

Mohammad Hosseinzadeh 1 Nov 23, 2021
IPython: Productive Interactive Computing

IPython: Productive Interactive Computing Overview Welcome to IPython. Our full documentation is available on ipython.readthedocs.io and contains info

IPython 15.6k Dec 31, 2022
Packaging tools for shanty services.

parcel Packaging tools for shanty services. What? Services are docker containers deployed by shanty on a hosting appliance. Each service consists of t

0 Jan 20, 2022
A program that makes all 47 textures of Optifine CTM only using 2 textures

A program that makes all 47 textures of Optifine CTM only using 2 textures

1 Jan 22, 2022
An open source server for Super Mario Bros. 35

SMB35 A custom server for Super Mario Bros. 35 This server is highly experimental. Do not expect it to work without flaws.

Yannik Marchand 162 Dec 07, 2022
because rico hates uuid's

terrible-uuid-lambda because rico hates uuid's sub 200ms response times! Try it out here: https://api.mathisvaneetvelde.com/uuid https://api.mathisvan

Mathis Van Eetvelde 2 Feb 15, 2022