Calc.py - A powerful Python REPL calculator

Related tags

Miscellaneouscalc.py
Overview

Calc - A powerful Python REPL calculator

This is a calculator with a complex source that includes a small AST, a parser and a tokenizer. This is a personal project done in 2 days to understand how operator precedence works and to practice my rusty skills of making interpreters.

This project has no external dependencies and should work with minimum Python 3.8 and newer versions of the Python interpreter.

Features

  • Complex but small and understandable source code. Implemented in less than 450LoC
  • Supports all basic operations (sum, substraction, multiplication, division)
  • Supports use of parentheses
  • Proper precedence order of operations
  • Rich errors handling (human-readable exceptions and hints to fix them)

Usage

Just start main.py with Python, this will create a REPL in your terminal which you can close by typing exit.

Modules explanation

  • ast
    • Contains all Tree classes
  • evaluator
    • Evaluates our generated AST
  • exception
    • Error handling, custom Exception class
  • parser
    • Parses our generated tokens and makes an AST
  • scanner
    • Scans our expressions and makes tokens
  • token
    • Tokenizer classes, debugging function to print tokens

License

This calculator is licensed under GPLv3.

Owner
Alejandro
Linux enthusiast, Neovim simp.
Alejandro
GEGVL: Google Earth Based Geoscience Video Library

Google Earth Based Geoscience Video Library is transforming to Server Based. The

3 Feb 11, 2022
Malicious Document IoC Extractor is a collection of scripts that helps extracting IoCs from various maldoc families.

MDIExtractor Malicious Document IoC Extractor (MDIExtractor) is a collection of scripts that helps extracting IoCs from various maldoc families. Prere

Malwrologist 14 Nov 25, 2022
Listen Surah, prepare for next and Endless life...

Al-Quran In this repository, I have linked up all Surah with Arabic-Bangla Audio From Youtube. So, you just need to choose and listen. and the ( surah

SpiderX 1 Sep 30, 2022
Implementation of the Folders📂 esoteric programming language, a language with no code and just folders.

Folders.py Folders is an esoteric programming language, created by Daniel Temkin in 2015, which encodes the program entirely into the directory struct

Sina Khalili 425 Dec 17, 2022
Singularity Containers on Apple M1 (ARM64)

Singularity Containers on Apple M1 (ARM64) This is a repository containing a ready-to-use environment for singularity in arm64 (M1). It has been prepa

Manuel Parra 4 Nov 14, 2022
Python code to control laboratory hardware and perform Bayesian reaction optimization on the MIT Make-It system for chemical synthesis

Description This repository contains code accompanying the following paper on the Make-It robotic flow chemistry platform developed by the Jensen Rese

Anirudh Nambiar 11 Dec 10, 2022
Self sustained producer-consumer(prosumer) policy study using Python and Gurobi

Prosumer Policy This project aims to model the optimum dispatch behaviour of households with PV and battery systems under different policy instrument

Tom Xu 3 Aug 31, 2022
You'll learn about Iterators, Generators, Closure, Decorators, Property, and RegEx in detail with examples.

07_Python_Advanced_Topics Introduction 👋 In this tutorial, you will learn about: Python Iterators: They are objects that can be iterated upon. In thi

Milaan Parmar / Милан пармар / _米兰 帕尔马 252 Dec 23, 2022
Random Turkish name generator with realistic probabilities.

trnames Random Turkish name generator with realistic probabilities. Based on Trey Hunner's names package. Installation The package can be installed us

Kaan Öztürk 20 Jan 02, 2023
A script that will warn you, by opening a new browser tab, when there are new content in your favourite websites.

web check A script that will warn you, by opening a new browser tab, when there are new content in your favourite websites. What it does The script wi

Jaime Álvarez 52 Mar 15, 2022
A simply dashboard to view commodities position data based on CFTC reports

commodities-dashboard A simply dashboard to view commodities position data based on CFTC reports This is a python project using Dash and plotly to con

71 Dec 19, 2022
Configure request params such as text, color, size etc. And then download the image

Configure request params such as text, color, size etc. And then download the image

6 Aug 18, 2022
奇遇淘客服务器端

奇遇淘客 APP 服务器端 警告 正在使用 v0.2.0 版本的用户,请尽快升级到 v0.2.1。 v0.2.0 版本的 Docker 镜像中包含了有问题的 aiohttp。 奇遇淘客代码库 奇遇淘客 iOS APP 奇遇淘客 Android APP 奇遇淘客文档 服务器端文档 Docker 使用

奇遇科技 92 Nov 09, 2022
March-madness - March Madness results 1985-2021

march-madness Results for all 2,268 NCAA Division I Men's Basketball Tournament games since the modern format was introduced in 1985. Includes years,

Darik Harter 2 Feb 26, 2022
A free website that keeps the people informed about housing and evictions.

Eviction Tracker Currently helping verify detainer warrant data for middle Tennessee - via Middle TN DSA - Red Door Collective Features Presents data

Red Door Collective 7 Dec 14, 2022
Nextstrain build targeted to Omicron

About This repository analyzes viral genomes using Nextstrain to understand how SARS-CoV-2, the virus that is responsible for the COVID-19 pandemic, e

Bedford Lab 9 May 25, 2022
Find functions without canary check (or similar)

Ghidra Check Protector Which non-trivial functions don't reference the stack canary checker (or other, user-defined function)? Place your cursor to th

buherator 3 Jan 17, 2022
Simple Python-based web application to allow UGM students to fill their QR presence list without having another device in hand.

Praesentia Praesentia is a simple Python-based web application to allow UGM students to fill their QR presence list without having another device in h

loncat 20 Sep 29, 2022
A project to work with databases in 4 worksheets, insert, update, select, delete using Python and MySqI

A project to work with databases in 4 worksheets, insert, update, select, delete using Python and MySqI As a small project for school or college hope it is useful

Sina Org 1 Jan 11, 2022
GCP Scripts and API Client Toolss

GCP Scripts and API Client Toolss Script Authentication The scripts and CLI assume GCP Application Default Credentials are set. Credentials can be set

3 Feb 21, 2022